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: 4.5VStandby current: ≤ 4UAWireless Frequency: 433MHzEncode: HS1527Adjust Method: ASKPowered by 3 pieces of AAA batteries.Wireless coding: PT1527, EV2262Wireless distance: 100M in open area1 button: CallSize: 86 x 86 x 18mm Package includeds : 1 x KERUI F86 Wireless Call Button2 x Nail3 x AAA BatteryNOTE: The button Cannot work alone. It need to work with calling system. Details pictures :