Feature: 1. Quick Calling: When there is emergency, just push the call button, and the alert message will immediately send to the receiver. 2. Stable Signal: The working range can get up to 330 meters in an open area, making sure that you will never loss a call in night. 3. Alerting Mode: Has 38 pieces music and 4 level volume adjustment, also enables free matching between transmitter and receiver. 4. Extensive Use: Can be widely applied in home, nursing home, hospital and so on, suits perfectly for the elderly, patient, etc. 5. Easy Carrying: Comes with a light weight and a compact size as well, ideal for both indoor and outdoor, safeguarding the safety. Specification: Item Type: Caregiver Pager Material: ABS Wireless Reception Distance: Approx. 330m / 1082.68ft at open space. Wireless Frequency: 433MHZ Method: One to one. Built In Polymer Lithium Battery: 1 x 1000mAh for receiver, 1 x 23A battery 60mAh for transmitter. . Package List: 1 x Receiver1 x Button1 x Charging Cable1 x User Manual