The RF-BM-ND04C from RF-star is a RF Module with Frequency 2402 to 2480 MHz, Data Rate 1 to 2 Mbps, Supply Voltage 1.7 to 3.6 V, Current Receiving 4.6 mA (Peak RX), Current Transmitting 4.6 mA (Peak TX). More details for RF-BM-ND04C can be seen below.