Wireless Motion Sensor Doorbell Automatic Door Bell Welcome PIR Detector Alarm for Shop Store

Features : Pyroelectric infrared sensor induction AAA batteries or 5V power supply Power-off memory function. Specification : Power supply mode: External DC 5V power supply or 3pcs AAA batteries Working Current: Sleep standby mode: 120uA Playing mode: 200mA Sample Rate: 44.1Khz/320Kbps Infrared Induction Range: 4m(45angle) Working temperature: -10 to 35 Working humidity: 10~85%RH Playing sound: 90dB Package includeds : 1 x Automatic PIR Doorbell Alarm 1 x Set of Accessoies Details pictures :