1PC smart wireless home doorbell, crisp and clean sound quality, can be placed anywhere Unique selling points of doorbell receiver: 1. Human body induction night light doorbell. At night when people come, the lights are on, and when people go, the lights are off. The receiver can be used as a night light, and can be placed in the bedroom, kid's room, living room light, kitchen, etc. 2. Brilliant lighting, very suitable for the deaf and the elderly 3. USB powered and can be placed arbitrarily. Suitable for use all over the world 4. 4 unique mode functions: flashing but not sounding, sounding but not flashing, flashing and louding, always bright and flashing 5. The sound quality is crisp and clean, no noise, and the sound is pleasing to the ear Wiring is more stable 1.Power input:AC 12-24V/1A 2.USB powered PIR Motion Detection Keep your house safety all the time When motion is dected , it will take pactureand send alert to your phone. Tw- Way voice talk --Built in microphone and speaker,support real time video,which allows you talk with your visitor in real time wherever you are. --When a visitor presses the doorbell sound is activated and the camera will start sending real- time images and call to the cell phone. --Once someone is ringing the bell, you will getthe push notification. --130 wide angle, see more detail, monitor large area, keep your home safe. range up to 200m Penetration is very strong, (note: this may affect the shortening of the distance)