Feature:1. Adjustable: The pager has 38 music tracks to choose from and 4 levels of volume adjustment, which can be adjusted according to your preference.2. Easy to Use: The transmitter and receiver of the pager can be paired at will, making it easy to use and highly penetrating.3. Wide Application: The pager can be applied to scenarios such as elderly pager, wireless doorbell, greeter, and hospital patient call.4. Remote Transmission: The pager can achieve ultra long distance signal transmission, 330 meters in open area and 50 meters through the wall.5. ABS Housing: The pager is made of ABS, and the buttons are small and lightweight, so it's easy to just press them.Specification:Item Type: Elderly Monitoring Call Button Material: ABSWireless Reception Distance: Approx. 330m / 1.82.7ft (open area)Wireless Frequency: 433MHZMode: 1 to 2Remote Control Built in Battery: 2 x 23A/60mAh alkaline batteryVoltage: 100-240V.Package List:1 x Elderly Monitoring Call Receiver2 x Remote Control1 x Instruction