3,200 Pa (target spec)
Designed to hold on
The vacuum is designed to hold it on vertical glass, inside and out, with the tether clipped inside as a backup.
Scroll to see it work · Animation (AI-generated), not a cleaning result
Klarsyn One · Window Cleaning Robot
Clear windows. No ladder.
- Designed to hold to the glass with 3,200 Pa (target spec), inside and out
- Sprays by itself, scrubs with two rotating pads
- Safety tether, backup battery, pressure sensor (target specs)
€149,99 EURincl. GST · ships freeLaunch offer: free bonus set of 24 extra pads + 3 cleaning concentrates
Illustrative image (AI-generated).
One button to start.
Start it with the remote.
Free shippingdelivered in 2–3 weeks
30-day returnschange of mind; restocking fee applies, see policy
Help by email and chatquestions before and after you buy
Consumer guaranteesrepair, replacement or refund if faulty (ACL)
Illustrative images (AI-generated). Pre-series design.
New for 2026
Klarsyn One
Window cleaning robot for windows, skylights and shower screens
€149,99 EURincl. GST
ships free
ships free
Klarsyn One€149,99 EUR · incl. GST · ships free
Launch offer: free bonus set of 24 extra pads + 3 cleaning concentrates
In the box: robot, remote, safety tether, 8 pads, power supply with 5 m cord + 1 m extension, glass-cleaner concentrate 50 ml, storage bag
Quantity
1 × €149,99 EUR
Max. 3 per order
- 30-day change-of-mind returns, restocking fee applies (policy)
- Safety tether + 8 washable pads included
- Help by email and chat
- 1-year limited warranty
Price in AUD, including GST. Nothing is added at checkout. Free shipping · delivered in 2–3 weeks.
How it cleans a pane.
It holds on, sprays, scrubs and finds the edges. All figures are target specs from the spec sheet; images are illustrative (AI-generated).
2 nozzles
Sprays by itself
Left and right, in the direction of travel, from an 80 ml tank.
2 pads
Scrubs, not just wipes
Two counter-rotating microfibre pads are designed to lift dried-on spots. Heavy dirt may need a second pass.
Edge detection
Finds the edges
Sensors are designed to detect frames and frameless edges, and it is designed to plan its own route across the glass.
Safety
Clean the outside without a ladder.
You place it on the outside of the glass from indoors. You stay inside, feet on the floor.
- Safety tether with carabiner: clipped to a window handle or another solid point inside.
- Backup battery: designed to keep the vacuum on and beep if the power cuts out. Backup runtime not yet specified.
- Pressure sensor: designed to stop it moving if suction drops.
Before every outside use: check the tether for wear, clip it to a solid point inside, and don’t use it in rain, frost or strong wind. Stay nearby while it works. Target specs per the spec sheet; pre-series sample in testing. Images are illustrative (AI-generated).
- 1Two nozzles spray just ahead of the robot.
- 2Two rotating pads scrub the wet glass.
- 3The pads pick up the loosened dirt behind it.
Auto-spray
It sprays. You don’t.
No pre-spraying, no bucket. Per the spec sheet, two nozzles wet the glass just before the pads pass over it, designed so loosened dirt is picked up instead of smeared.
Very dirty glass may need a second pass or a fresh pad.
Where to use it
Made for smooth glass.
Vertical, sloped or flat, framed or frameless. Per the spec sheet, any smooth pane from 40 × 40 cm; textured glass holds suction less well.
- Windows & picture windows
- Sliding and patio doors
- Sunrooms & skylights
- Shower screens & mirrors
Illustrative image (AI-generated).
What it saves you.
Stay off the ladder
Reach high panes and the outside of the glass from indoors, without a ladder or leaning out.
No bucket, no squeegee
Fill the tank and put it on the glass. It does the spraying.
One-button start
Start it with the remote. It’s designed to beep when the pane is done; stay nearby while it works.
Frameless glass too
Edge detection is designed for shower screens and frameless windows. Always use the tether.
Under 65 dB
Operating noise under 65 dB (target spec).
Pads go in the wash
8 microfibre pads in the box. Machine-wash at 40 °C and reuse.
Four things to check on any window robot.
Robots differ most on these points. Here is what Klarsyn One lists, and what to look for elsewhere.
| Feature | Klarsyn One | What to check on other models |
|---|---|---|
| Spray system | automatic, 2 nozzles | Does it spray by itself, or do you pre-spray the glass? |
| Pads | 2 rotating pads | Rotating pads, or one flat pad or cloth? |
| Safety tether | included, with carabiner | Is a tether in the box, and how long is it? |
| Backup battery | yes, designed to hold the vacuum | On corded models: what holds it if the power cuts out? |
Klarsyn One figures are target specs per the spec sheet (pre-series sample in testing).
What’s in the box.
In the box
- 1×Klarsyn One robot
- 8×microfibre pads, washable
- 1×safety tether with carabiner
- 1×remote control
- 1×power supply with 5 m cord + 1 m extension
- 1×glass-cleaner concentrate 50 ml & storage bag
Specifications
Suction3,200 Pa
Spray systemAutomatic, 2 nozzles
Spray tank80 ml
Pads2 rotating, round
Backup batteryyes
Safety tetheryes, with carabiner
NavigationRoute planning, edge detection
Weightapprox. 1.1 kg
Noise< 65 dB
Glass sizefrom 40 × 40 cm
ControlsRemote, auto mode
SurfacesGlass, mirrors, smooth tiles (no grout lines)
Target specs per the spec sheet; pre-series sample in testing.
Three steps to get started.
Step 1Clip in & place it
Clip the tether to a solid point inside, fill the tank, hold it to the glass. The vacuum is designed to grip straight away.
Step 2Press start
Auto mode on the remote. It is designed to measure the pane and pick its route.
Step 3Stay nearby
Keep it in sight while it works. It’s designed to beep when the pane is done: take it off from inside, robot first, then the tether.
Illustrative images (AI-generated).
Buying from us.
30 days
Change-of-mind returns within 30 days (restocking fee applies, see the return policy). Faulty items: repair, replacement or refund under the Australian Consumer Law.
Free shipping
Free shipping · delivered in 2–3 weeks (shipping policy).
Email and chat
Questions before or after you buy? Reach us by email or chat.
New for 2026
No reviews yet. Here’s how to judge it yourself.
Klarsyn One is a new product, so there are no customer reviews to show yet. Instead, here’s a checklist for your first 30 days with it on your own windows.
See the offer: €149,99 EUR incl. GSTYour 30-day check
- Does it hold outside? Try an outside pane you can reach from indoors, with the tether clipped inside.
- Does the glass come clear? Pick your dirtiest window, not your cleanest.
- Is the noise OK for you? Run it on a few panes in a row.
- How much work is left? Count the minutes for setup and pad changes.
Not for you? Change-of-mind returns within 30 days (restocking fee applies, see the return policy). Faulty items: repair, replacement or refund under the Australian Consumer Law.
Get your view back.
It ships free. Try it on your own windows.
Klarsyn One · €149,99 EUR incl. GST · ships free
Launch offer: free bonus set of 24 extra pads + 3 cleaning concentrates
Add to cartImage: illustrative (AI-generated). Goes straight to cart · incl. GST · ships free · change-of-mind returns within 30 days (restocking fee applies, see policy); faulty items: repair, replacement or refund under the ACL
Frequently asked questions
01Can it clean the outside of the window?
It’s designed to. You place Klarsyn on the outside of the glass from indoors, and the safety tether stays clipped to a solid point inside, such as a window handle or lock. You need to be able to reach the outside of the pane from indoors, for example through an opening window.
02How does it stay on vertical glass?
It’s designed to hold on with 3,200 Pa of suction (target spec). A pressure sensor is designed to stop the robot if suction drops, and the tether is the backup. A pre-series sample is still in testing.
03Does it work on frameless glass?
Per the spec sheet, edge detection is designed to stop it at frameless edges and turn it around. On shower screens and frameless windows, always use the safety tether as well.
04What happens if the power goes out?
Per the spec sheet, a built-in backup battery is designed to keep the vacuum running and beep to get your attention. The backup runtime isn’t specified yet, so take it off the glass straight away, and always use the tether.
05How big does the pane have to be?
Per the spec sheet, from about 40 × 40 cm. It isn’t made for leadlight or colonial-style windows or very small panes.
06Does it leave streaks?
The auto-spray is designed to wet the glass ahead of the pads, and the rotating pads are designed to pick up loosened dirt. Results depend on how dirty the glass is: very dirty windows may need two passes or a fresh pad.
07How loud is it?
Under 65 dB in use (target spec).
08Is there an app?
No. Klarsyn One starts from the included remote and runs in auto mode.
09Does it have reviews?
Not yet. Klarsyn One is new for 2026, and we don’t show reviews we don’t have. All specs on this page are target values; a pre-series sample is in testing.
10When will it arrive?
Free shipping · delivered in 2–3 weeks.
11How do returns work?
Change of mind: email us within 30 days of purchase to request a return; a restocking fee applies, as set out in the return policy. If the product is faulty, the Australian Consumer Law applies regardless of that policy: you’re entitled to a repair, replacement or refund, depending on the failure. Return policy.
12Is GST included?
Yes. The price shown includes GST, and it is the total you pay at checkout.
13Is there a warranty?
1-year limited warranty: if your Klarsyn One develops a fault within 12 months of delivery, we repair or replace it. Contact contact@cosarit.com. This is in addition to your rights under the Australian Consumer Law.