This product is equipped with a wireless receiver & sender on 2.4G frequency and a wireless receiving & sending module with the core of 8051. The module is designed for all kinds of wireless devices, works on ISM (Industry, science and medicine) frequency. There are 125 frequency point for the unit, can work as point to point, point to multi-points wireless communication, meantime you can change the frequency range to avoid disturbing. The maximum transmission velocity of the unit would be 1M bit/S, and maximum transmission power is 0 dBm. The sensitive rate of the module is -90dBm, working voltage is 1.9v--3.6v, environmental temperature is -40--+80 C.