Feature:1. With Motion Sensing Light: Automatically lights up when detects movement, turn off when someone leaves. The receiver can be used as a night light, place it in the bedroom, children's room, living room light, kitchen and other locations2. USB Powered: Powered by USB, the wireless smart doorbell offers flexible placement and global compatibility. Its vibrant lighting is ideal for the deaf and elderly.3. 4 Modes: With 4 unique modes, the doorbell caters to diverse preferences. Choose between flashing only, ringing only, flashing and ringing, or staying lit and flashing.4. Waterproof: With an IP55 waterproof rating and built in waterproof tape, the doorbell button ensures reliable operation in all weather conditions.5. Label Cover and Door Distinguish: Button is equipped with label cover, you can place the house number and other reminder information; With front and back doors distinguish function, press different buttons, the receiver will emit different music.Specification:Item Type: Wireless DoorbellMaterial: ABSReceiver Sensing Angle: 120 DegreesReceiver Sensing Distance: 0 - 3 Meters / 0 - 9.8ftVoltage: DC 5VOperating Frequency: 433 MHzVolume: 25 - 100 DecibelsMusic: 58 MelodiesWaterproof Grade: IP55Operating Distance: 200m / 656.2ft in Open AreaDoorbell Battery: 1 x 240 mAh CR2032 Button Battery with Built in Battery for Delivery.Package List:1 x Receiver1 x Doorbell1 x USB Power Cord2 x Screws2 x Expansion Screw2 x Adhesive Stickers1 x English InstructionsNote:USB powered, the doorbell receiver is not built‑in battery, unplug the USB cable of receiver, the receiver will not work.