Welcome to our store!1、Multipurpose: Wireless transmitter call button is widely used on doorbells, old man ringers, panic buttons and other scenes.2、Prevent Loss: Wireless transmitter call button is equipped with lanyard, can be used as the elderly ringer, not easy to lose.3、Long Range: Wireless call button is received at 330m/1082.7ft in the open field, and rings at 50m/164.0ft through the wall on the 1st and 3rd floors.4、Waterproof Design: Wireless call button built in large silicone pad, after many body waterproof tests, waterproof effect is excellent5、Wide Application: Wireless transmitter call button is suitable for home, clinic, hospital, cafe, restaurant service, etc.Item Type: Wireless Nurse Call Transmitter ButtonMaterial: ABSWireless Receiving Distance: Approx. 330m/1082.7ft (Open Area)Wireless Frequency: 433MHZBuilt in Battery Specification: 60mAh 23A battery x 55 x Wireless Nurse Call Transmitter ButtonIf you receive your item and find any product problems, such as damage or incorrect quantity of goods, please immediately. We will do our best to provide you with satisfactory customer service.