Wireless Caregiver Pager include 3 Plug-in Receiver and 2 Motion Sensor. Signals connected receivers if/when motion is detected.Allows caregiver freedom to monitor movement remotely..Motion Detector Security Sensor detects movement within 16.4ft range x 110°. It transmits the signal to receivers within the 500ft/150m in open area. It with optional adjustable mounting bracket. It's not waterproof. If it is used outdoors, a waterproof cover shall be added..Visual and Sound Alerts: When the sensor is engaged, the LED light indicator flashes to perform a visual alert. It's a great visual indicator when you are listening to music or for the hearing impaired. You can personalize your receivers with 58 unique ringtones and 5 volume levels (0-110dB)..Easy Installation: EverNary Wireless Monitor Sensor is battery (also can use USB cable) operated for fast and easy use. Each receiver can be paired with up to 20 transmitters. Each transmitter can be paired with up to 20 receivers..Wide Usage: Use as Entry Alert for home/Business.It also can be used at the front door, back door, mailbox, garage and driveway.