Voice prompter into the store welcome to the doorbell sensor home welcome alarm reminder Specification: Name: Welcome doorbell Material: ABS Audio output power: 0.8-1W Audio format: MP3 Infrared sensing range: 2-7 meters (110 degree viewing angle) Power supply mode: 5V 1A regulated power supply Working current: sleep standby state (100uA), playback state (300mA (DC5)). Receiving distance: 280m straight line on open ground Sensor power supply mode: battery powered or power cord powered Receiver power supply mode: plug in (110/220V) Volume level: five of volume (adjustable for flashing) Music selection: 52 types (6 welcome words, 45 chord music, 1 emergency reminder) Easy installation: can be installed with double-sided tape or screws Occasion: Shop, Mall,at home Security Notification Features: Automatic voice induction broadcast, sensing distance 2-7 meters. Can control volume, smart chip, 5-level volume control, weak/medium/strong can be switched. voice recording and broadcasting, you can turn on the recording mode to record what you need. Easy to use, no installation required. USB charging, charge can be used for 3-5 months, and the use time is long. Package: 1 sensor, 1 receiver