ST-WA9 Ultra-Slim Square Window Cleaning Robot – 3200 Pa Smart Suction, 60 mL Ultrasonic Mist & 10 Cleaning Modes

ST-WA9 Automatic Window Cleaning Robot – Specifications at a Glance

The ST-WA9 is an ultra-slim, square automatic window cleaning robot built for framed and lattice panes, glass doors and mirrors. A BLDC brushless motor at 29,000 rpm drives 3200 Pa of smart-adjust suction, a 60 mL built-in tank feeds an ultrasonic mist system, and 10 cleaning modes cover frames, edges and corners automatically. If the power is cut, the built-in battery keeps the window cleaning robot adhered to the glass for 20 to 30 minutes.

Ultra-Slim 6.5 cm Square Body That Glides over Lattice Windows

At 229 × 229 × 65 mm the ST-WA9 is only 6.5 cm thick, and that slim square profile is what lets it glide over lattice windows, glass doors, mirrors and framed panes instead of hanging up on muntins and narrow reveals. A window cleaning robot with a thicker body needs clearance that divided panes simply do not offer; this one covers the full surface of the glass and still fits between the frame and the muntin.

A leather carry handle sits on top of the body, so moving the robot window to window takes one hand. At about 1.40 kg it stays manageable on balconies, ladder work and floor-to-ceiling glazing, where a heavier machine turns a one-person job into two.

3200 Pa Smart-Adjust Suction Keeps the Window Cleaning Robot Firm on Glass

3200 Pa of smart-adjust suction holds the window cleaning robot firmly against the pane while the fan adjusts its pull as the machine moves. Two things depend on that grip: the hold has to survive the weight of the body when the robot is working vertically, and the pressure has to stay even so the cleaning stroke does not thin out across a large pane.

The BLDC brushless motor runs at 29,000 rpm and drives the suction directly, with no brushes to wear down. Combined with a minimum working area of 60 × 40 cm, the ST-WA9 covers everything from a single casement pane to large building windows in the same session.

Ultrasonic Mist System with a 60 mL Built-in Tank

The 60 mL built-in tank feeds an ultrasonic atomization system rather than a coarse pump spray. Ultrasonic mist lays down a fine, even film of water, and the two-level spray setting lets you choose a lighter or heavier wetting depending on how dirty the glass is.

Wetting the pane before every wipe is what separates a clean window from a streaked one. The mop pad lifts dust and grime instead of dragging dry particles across the surface, so there are fewer refills mid-job and noticeably less streaking on the finished pane.

2.4G Non-IR Remote Control up to 20 m

The remote runs on 2.4 GHz rather than infrared, so it reaches up to 20 m without line of sight. That is the practical difference between aiming a remote at the machine and simply pressing a button: on high panes you can steer the window cleaning robot safely from the floor, switch mode without walking back to the window, and keep your hands clear of the glass while the robot is working.

Because the signal does not need a clear path, the remote also works when the robot is above head height, behind a curtain edge or on the far side of a large glazed wall — the situations where an infrared remote usually stops responding.

10 Cleaning Modes: Auto, N Pattern, Z Pattern, Spot and Deep

Ten cleaning modes cover the routes that actually matter: Auto for a full pane, N pattern and Z pattern for systematic coverage, Spot for a single stubborn mark and Deep for heavy contamination. Route planning is what auto-covers frames, edges and corners, which is the part that is hardest to handle by hand on a divided window — and the part that most often decides whether a window cleaning robot is genuinely usable on site.

The same mode set suits lattice windows, glass doors and mirrors, so a single window cleaning robot covers the glass surfaces of a home, an office floor or a hotel corridor without extra attachments or a second machine.

Power-Off Safety Protection: 20–30 Minutes of Adhesion

A 300 mAh, 14.8 V lithium battery keeps the window cleaning robot adhered to the glass for 20 to 30 minutes after a power cut, which removes the fall risk on tall glass. The safety rope supplied with the machine adds a second line of protection on high floors.

Charging takes 25 minutes to restart work and 2.5 hours for a full charge, so a break in a long cleaning session costs very little time before the next pane can be started — a practical detail for anyone running a window cleaning robot across a whole building rather than a single window.

ST-WA9 Window Cleaning Robot Specifications and What Is in the Box

Size 229 × 229 × 65 mm, weight about 1.40 kg, input 100–240 V with 24 V / 3 A output at 72 W rated power, suction power 3200 Pa, noise about 60 dB, battery 300 mAh / 14.8 V Li, UPS time 20–30 minutes, fan motor BLDC brushless at 29,000 rpm, spray method ultrasonic atomization, water tank 60 mL, 10 cleaning modes and a 2.4G remote with a 20 m range.

Everything needed for a first run is in the box:

• Remote control
• Adapter
• AC / DC cables
• Sprayer
• Spare mop pads
• Safety rope
• User manual

The 100–240 V input means one adapter covers worldwide use, and the machine works out of the box — the rope stays attached on high floors as extra protection.

3200 Pa Suction, Streak-Free Clarity

Suction and water work as a pair. 3200 Pa keeps the mop pad pressed evenly on the glass, the ultrasonic mist keeps that pad wet, and the result is a clear pane rather than a smeared one. On a coastal or city building, where rain film, salt and traffic dust build up between cleaning rounds, that combination is what produces streak-free clarity in a single pass. It is also why this unit is judged, in review, as a cleaning robot for windows rather than a novelty gadget: the fan and the spray are designed to work together, not in sequence.

Compact 229 × 229 × 65 mm Window Cleaning Robot at about 1.40 kg

All dimensions are measured manually, so slight variations may occur, but the footprint is close to a sheet of A4 paper turned sideways. The 65 mm profile is the number that decides whether a window cleaning robot can pass under a window frame, over a sill or across a pane divided by muntins.

At about 1.40 kg the unit is light enough to lift onto a window frame with one hand and small enough to store on a shelf or in a service cupboard, which is what makes it practical for a team moving between rooms and floors rather than a machine that lives permanently on one window. If you are sourcing a cleaning robot for windows for a hotel, an office block or a residential project, those two figures — 65 mm and 1.40 kg — matter more in daily use than any headline number.

Cleans Multiple Tough Stains: Bird Droppings, Rain Stain, Dust, Dirt and Mould

Exterior glass collects a predictable set of marks: bird droppings, rain stain, dust, dirt and mould. Each behaves differently. Droppings and rain stain need water and contact time, dust and dirt need suction and a wet pad, and mould needs repeated passes over the same spot — which is why the spray level and the cleaning mode on a window cleaning robot matter as much as the suction figure on its own.

Five capabilities do the work: powerful suction so the robot stays firmly on the glass, smart navigation so it cleans every corner, safety protection through UPS backup and the safety rope, automatic water spray for a better cleaning effect, and one-touch operation so anyone can start a full cycle.

Who Buys the ST-WA9 Window Cleaning Robot

The ST-WA9 is built for distributors and importers of home appliances and cleaning equipment in the EU, US, Middle East and Southeast Asia; for cleaning-service and facility teams working in offices, hotels and apartments; for home and lifestyle e-commerce sellers; and for property developers equipping new buildings. Stocking orders through to container programmes are both covered, and the same machine handles framed windows, lattice panes, glass doors and mirrors.

What makes a window cleaning robot sell through these channels is the same in every case: safe glass care at height, without scaffolds and without sending anyone out onto a ledge. Buyers comparing a cleaning robot for windows on specification look first at suction, water capacity, mode count and power-off safety, because those four decide whether the machine is usable on a real building.

Customization and Ordering for Your Window Cleaning Robot Programme

Custom colour, logo and packaging are available on request. Send your target quantity and destination market and the specification and lead time come back in the quote, with detailed specs returned within 24 hours. If you want to validate performance before committing to a volume order, order a sample and test the suction, the mist and the edge handling on real glass first.

Distributors often start with a trial container of one window cleaning robot model, place it in their own market and then expand the range once the sell-through is proven. Tell us the destination port and annual volume and we will structure the quote around that plan.

Browse the rest of the range on our smart window cleaning robot category page, or send us your requirements and we will match the model to the job.

Frequently Asked Questions About the ST-WA9

What is the ST-WA9 window cleaning robot, and what glass can it clean?

The ST-WA9 is an ultra-slim, square automatic window cleaning robot for framed windows, lattice panes, glass doors and mirrors. It works on vertical glass from a 60 × 40 cm minimum working area upwards, holds on with 3200 Pa of smart-adjust suction, wets the pane with ultrasonic mist from a 60 mL tank, and cleans in 10 modes with a 2.4G remote.

How does 3200 Pa smart-adjust suction keep the robot on vertical glass?

Suction is the force holding a window cleaning robot against the pane, and it has to carry the weight of the body while the machine is working vertically. The ST-WA9 runs at 3200 Pa with a BLDC brushless motor at 29,000 rpm and adjusts its pull automatically, so the grip stays firm and the cleaning pressure stays even from the edge of a pane to the middle of a large building window.

What does the ultrasonic mist system do, and how much water does the tank hold?

The built-in tank holds 60 mL and feeds an ultrasonic atomization system that lays down a fine, even film of water, with a two-level spray setting for lighter or heavier wetting. Wetting the glass before every wipe lets the mop pad lift dust and grime instead of pushing dry particles across the surface, which means fewer refills and less streaking.

How far does the 2.4G remote reach, and does it need line of sight?

The remote works on 2.4 GHz and reaches up to 20 m without line of sight. Because it is not infrared, you do not have to point it at the machine, so high panes can be steered safely from the floor and the mode can be changed without walking back to the window.

What are the 10 cleaning modes, and which one should I use?

The ST-WA9 runs 10 cleaning modes: Auto for a full pane, N pattern and Z pattern for systematic coverage, Spot for a single mark and Deep for heavy contamination. Route planning auto-covers frames, edges and corners, and the same mode set suits lattice windows, glass doors and mirrors.

What happens if the power is cut while the robot is on the glass?

A 300 mAh, 14.8 V lithium battery provides power-off safety protection and keeps the window cleaning robot adhered to the glass for 20 to 30 minutes after a power cut, which removes the fall risk on tall glass. The supplied safety rope acts as a second line of protection on high floors, and charging takes 25 minutes to restart work or 2.5 hours for a full charge.

How big is the ST-WA9, and what is the smallest pane it can clean?

The body measures 229 × 229 × 65 mm and weighs about 1.40 kg, with a leather carry handle on top. The minimum working area is 60 × 40 cm, and the 65 mm profile is what lets the robot pass under window frames and across panes divided by muntins. All dimensions are measured manually, so slight variations may occur.

What is included in the box?

Every unit ships with the remote control, adapter, AC / DC cables, sprayer, spare mop pads, safety rope and user manual, so the machine works out of the box. The safety rope stays attached on high floors as extra protection, and the 100–240 V input means one adapter covers worldwide use.

Can I customize colour, logo and packaging, and can I order a sample?

Yes — custom colour, logo and packaging are available on request. Send your target quantity and destination market and you will receive the specification and lead time in the quote, with detailed specs within 24 hours. A sample can be ordered first so you can test the suction, the mist and the edge handling on real glass before committing to a volume order.