3min/sqm Ultra-Fast Cleaning Speed 1. Automatically detects window frames 2. Anti-Falling control (When power failure, the machine will still maintain suction and not fall.) 3. Strong vacuum adsorption 4. Infrared remote control 5. Function: Planned Path Gyroscope/Automatic single side cleaning/Automatic return to the starting position Tips: 1. Binding the safety rope when using, Prevent falling from high altitude. 2. When you receive the item, please contact us if you have any questions, we will solve it for you. (When you don't know how to use it, I will give you answer and send you an operation video) If you select DHL / Seller's Shipping Method / Rets-Express China to ship it, you may be charged customs clearance and taxes for something purchased online. Buyers are responsible for custom taxes. This price is not including the custom tax. if you have special requirement, please leave a message when place order, or contact us. Warranty: We offer 3 year warranty for the robot. If there is any damage, we will send you the parts for free, please you install it (we will send you the installation video). But if it is artificially damaged, you need to pay some fees.