Features: 1.Long Distance Transmission: The barrier free reception distance is 350m, the indoor receiving distance is longer than 50m, ensures that the older can get help in time. 2.Memory Function: When you restart the device, the ringtone remianed unchanged, after an unexpected power outage, emergency pager will be the same setting when it restarted. 3.38 Songs: The medical alert system has 38 ringtones to choose from and 4 level volume to adjust, the sound is clear and loud, and equipped with LED indicator light. 4.Premium Material: Caregiver pager is made of premium ABS and silicone material, which is wear resistant, flame retardant, impact proof and durable. 5.Wide Application: This alert button can be used as the elderly call device, children call device, wake up device, nursing call device, and so on. Specification: Item Type: Caregiver Pager_x000D_ Material: ABS, silicone_x000D_ _x000D_ Music: 38 songs (4 levels of volume adjustable)_x000D_ Transmission Distance: Approx. 350m/1148.29ft (barrier free), 50m/164.04ft (indoor)_x000D_ Transmission Frequency: 433MHz_x000D_ Pager Size: Approx. 60x60x14mm/2.36x2.36x0.55in_x000D_ Receiver Size: Approx. 72x72x17mm/2.83x2.83x0.67in_x000D_ Receiver Plug Specifications: AC100-240V_x000D_ Battery: L1028 23A12V dry battery 200mAhx1 (built in)_x000D_ _x000D_ Application:_x000D_ Can be used as the elderly call device, children call device, wake up device, nursing call device PackageList: 2 x Transmitter 2 xReceiver 2 x Hand String Note: 1. Do not place the product in a corrosive, humid and high emperature environment!_x000D_ 2. Please supply power according to the voltage used. Other voltages may cause fire and product damage.