Premium Features: infrared-sensor for evading obstacles, and drop-sensing tech to avoid falls. High-Capacity Li-ion Battery: Delivers over 1.5 hours of fade-free power for constant, powerful suction. Two Work Mode：Press the button once to enter the small room mode(working for 30min), Press the button twice to enter the big room mode(working for 40-50min). Easy to clean: Clean your house with the click of a button. Versatile cleaning modes and the low-profile design facilitates cleaning under tables and chairs along with every nook and cranny. Two side brushes to remove messes such as dust, debris, allergens, a dam-board to collect rubbish. Coupled with multi cleaning modes, It can easily clean life’s various messes. What You Get: Housmile Vacuum Cleaner (requires 18650 batteries, INCLUDED), AC power adapter, cleaning tool, 2 filters, 4 side brushes, 1 screwer, 4 Screws ，welcome guide About Housmile] This Robotic Vacuum Cleaner design derives from one of the top E-commerce retailers, Housmile, who has been in the research and development of stylish and useful household items for over 2 decades. Housmile, as always, would like to share the inspiring ideas of health, safety & conveniences with customers. We deal in a wide range of household items that will bring you a convenient life style. This Housmile Robotic Vacuum Cleaner is one of the latest and most typical models of our Robotic Vacuum Cleaner series that will make your day effortless and productive. Housmile Robotic Vacuum Cleaner with Drop-Sensing Technology and Powerful Suction, designed for hard floor and low-pile carpet [Product Specification] Side Brush: Dual Model: 3071C Frequency: AC 50/60Hz Power Rating: 10W Charging Time: 3-5hours What’s in the box: 1×Housmile Robotic Vacuum Cleaner 1×User manual 1× Apapter 4×Side brush 4×Screw 1×Screwdriver