This is a twochannel transmitter that is only activated when the correct combination is entered The device is designed for indoor or outdoor installation ensuring maximum security as the transmitted code changes with each transmission The expected transmission range is 200 meters in open space and 35 meters indoors The device is designed for a battery life equivalent to approximately 2 years of operation taking into account 10 transmissions per day Power supply 6 V DC 2 CR2032 lithium batteries Battery life 2 years 4 operations per day Frequency 43392 MHz 75 kHz Transmission power 1 Mw Data format Standard Operating temperature 20 ~ 55 degrees Celsius Password 08 Waterproof IP54 Material Plastic Metal Color Black Gray Package contents 1 x Keyboard 1 x English manual Only the above package contents other products are not included Note Light and different monitors may cause the color of the item in the picture to be slightly different from the actual item The measurement allowed error is 13 cm