Wireless Home Security Motion Sensor Alarm Door Bell Guest Chime Infrared PIR Sensor,motion can also be detected in the dark; Transmitter:80x80x40mm;receiver:69x104x23mm Wireless Receiver Sound up to 105dbs,36pcs(last 5S-25S options available) ringtones in storage;operating range(open area):up to 200M(656 Feet) Receiver with Flash Light & Hight low volume adjustable;Sensor with 360 degree adjustable angle,the detect range:3m-10m PIR Motion Detector can also be used as the nurse/patient alert solution for at-home caregivers and health care facilities. Using it worry free with factory 2 year quality warranty