KERUI F86 LED Wireless Square Nurse Waiter Emergency Touch One Key Call Button Alarm 433MHz

Features : This button is used for service call in the restaurant, bar etc and nurse call / emergency call in the hospital. Delivers the instant message to the host monitor, time-saving and labour-efficient. Blue light LED circled button. Low power consumption. Wireless signal transmit, stable frequency, interference-free. Low-power Consumption. Long Distance. Works with the host receiver(not included) cable-free installation, space-saving. Widely applied in home, factory, school, bank, store, apartment etc. Specification : Operating voltage: 4.5V Standby current: 4UA Wireless Frequency: 433MHz Encode: HS1527 Adjust Method: ASK Powered by 3 pieces of AAA batteries. Wireless coding: PT1527, EV2262 Wireless distance: 100M in open area 1 button: Call Size: 86 x 86 x 18mm Package includeds : 1 x KERUI F86 Wireless Call Button 2 x Nail 3 x AAA Battery NOTE: The button Cannot work alone. It need to work with calling system. Details pictures :