Window-cleaning robots / HOBOT

HOBOT 388

An app-controlled window robot that moves on two rotating cleaning rings and uses a single ultrasonic spray nozzle.

Sources checked: United States, Australia, United Kingdom, Canada
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HOBOT 388

Photo: HOBOT

Regional versions and model notes
  • United States: exact local listing unconfirmed
  • Australia: exact local listing unconfirmed
  • United Kingdom: exact local listing unconfirmed
  • Canada: exact local listing unconfirmed
  • Use framed windows: unlike S6 Pro, frameless support is not listed for this model.
  • Uses external power with a secured DC connector and a 20-minute backup UPS; it is not advertised as cordless.
  • Attach the safety rope and use correctly fitted cleaning rings.
  • Use pure water or the specified HOBOT detergent with the ultrasonic nozzle.

What it can do

Features and the setup they need.

Features, setup and recorded confirmation
Feature & setupConfirmation & sources

Clean in a zigzag route

Device feature

Inter-rotational cleaning runs at 70 rpm along a zigzag route.

What you’ll need

  • Use framed windows, secured external power and the supplied safety rope.
✓ Confirmed

HOBOT · 2026-10-26

Spray from the removable tank

Device feature

Single ultrasonic nozzle draws from a removable 24 mL tank.

✓ Confirmed

HOBOT · 2026-10-26

Steer with a phone or remote

Device feature

Supports iOS/Android smartphone control and an included remote.

✓ Confirmed

HOBOT · 2026-10-26

Check the minimum window size

Device feature

Specified workable window size is greater than 35 × 35 cm.

✓ Confirmed

HOBOT · 2026-10-26

What that means at home

Our reading of the specifications.

What to allow for

Use framed windows: unlike S6 Pro, frameless support is not listed for this model.

Living with it

Uses external power with a secured DC connector and a 20-minute backup UPS; it is not advertised as cordless.

Model and source notes
  • Use framed windows: unlike S6 Pro, frameless support is not listed for this model.
  • Uses external power with a secured DC connector and a 20-minute backup UPS; it is not advertised as cordless.
  • Attach the safety rope and use correctly fitted cleaning rings.
  • Use pure water or the specified HOBOT detergent with the ultrasonic nozzle.

Where we checked

Features are based on the linked manufacturer documentation. Household results also check the equipment and software you select. How we check.