SMART SENSOR TRASH CAN Advanced IPX5 waterproof technology prevents water or humid environment from damaging the unit. Leaving none water stain on surface after rinse. Fully-developed sensing technology reduces unnecessary openings and extends battery life. The lid stays open if your hands stay around the infrared motion sensor, which provides a comfortable user experience. Lid closes after 5 seconds automatically if none movement is detected by sensor. In cases that You want the lid to stay open, just gently touching the weight sensing button on the right, touch the button again to close. Product powered by 2 AA batteries. This trash can is perfectly designed for limited space. You dont have to endure the smell around trash can anymore! The built-in filter absorbs odor and inhibits bacteria growth. Each carbon filter lasts for about 2 moths. 4 Carbon Odor Filters included!