SODIAL(R) Music Chime Voice Greeting Warning Infrared Motion Sensor Welcome Doorbell White Product Name : Welcome Doorbell;Powered By : 3 x 1.5V AA Battery (Not Included);Three Settings : Music / Off / Voice Detecting Range : 5m-8m;Effective Angle : 110 Degree Alarming Sound Depth : 75-95dB;Total Size : 10 x 6.5 x 3.5 cm / 3.9" x 2.5" x 1.4" (L*W*H) External Material : Plastic;Color : White Net Weight : 83g;Package Content : 1 x Welcome Doorbell