Type: 1 transmitter to 3 receiver
Material: ABS
Main Color: Black
Color: customized
Frequency: 433.92MHZ
Distance: 10 -20meters
Sound: 90DB
Usage: Personal
Transmitter:1 pcs 27A Battery
Receiver: 1 pcs CR2032 Battery
Logo:customized
Composition: 1 transmitter and 3 receiver
Feature: environmental, no-radiation