XCSOURCE Stable CC1101 Wireless Module SMA Antenna Wireless Transceiver Module for Arduino TE298 Working voltage: 1.8-3.6V. Operating frequency:(Module:387-464MHZ). Instantaneous maximum working current: &lt;30mA. Maximum transmit power: 10mW (+10dBm). Support 2-FSK, GFSK and MSK modulation.