Emergency call button/senior alarm/radio transmitter and receiver alarm system. Perfect alarm for those who need help quickly, the emergency call button is a good option. The senior alarm system can give patients or seniors some privacy and control while providing security for their families. Emergency call button for seniors with a range of up to 350 meters in open areas (the effective indoor range is more than 50 meters). The senior alarm has 38 ringtones and 5 adjustable volumes. Supports precise pairing between multiple receivers and transmitters. Product description: Material: ABS Color: White Size: Receiver 72 × 72 × 14 mm, call button diameter 60 mm Free reception distance: 350 meters Practical indoor distance: 50 meters Package includes: 1 * Receiver 2 * Call button Description: Emergency call button for seniors. Ideal as an alarm for people who need help quickly, the caregiver does not need to be with the elderly all the time, the senior alarm is plug-and-play. The elderly do not need to shout, as long as people press the call button and the home emergency call rings, the elderly can get help, home care. It can also be used as a doorbell. Senior alarm, the range is 350M in open area (home emergency calls will not interfere with other devices, but the wall will affect the reception distance, so test the actual distance when you receive the product.) has 38 ringtones to choose from. Volume adjustable to 5 levels, the sound is throughout the house, this pager can be heard even with loud background noise. This emergency call button is easy to use and ideal for seniors. Easy to understand. This home emergency call for seniors supports pairing between multiple receivers and transmitters.