Feature: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 13 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 PagerMaterial: ABSWireless Reception Distance: 330m/1082.7ft (Open Area)Wireless Frequency: 433MHZMode: One for TwoBuilt in Li Polymer Battery: 2 x 23A 60mAh Battery (Transmitter)Voltage: 100240V.Package List:1 x Host2 x Button1 x Instruction Manual