Features: 1.EASY PAIRING: Caregiver call button has 38 music songs to choose from, 4 levels of volume adjustment, and the transmitter and receiver can be paired at will. 2.APPLICABLE SCENARIOS: Wireless caregiver pager can be used in scenarios such as elderly pager, wireless doorbell, greeter, and one touch call for hospital patients. 3.ULTRA LONG RANGE TRANSMISSION: Caregiver pager has ultra long range transmission, 330m of open space reception. 4.HIGH PENETRATION POWER: Alert button is available at the push of a button and penetrates well, 50m/164.0ft through the wall 1?3 floors are ringing. 5.EASY TO USE: Elderly monitoring call button is plug and play, easy to use by plugging the receiver into an electrical outlet, very convenient to use. specification:Item Type: Wireless Caregiver Pager Material: ABS Wireless Reception Distance: 330m/1082.7ft (Open Area) Wireless Frequency: 433MHZ Mode: One for Two Built in Li Polymer Battery: 2 x 23A 60mAh Battery (Transmitter) Voltage: 100?240V PackageList: 1 xHost 2 x Button 1 x Instruction Manual