The RF-BM-MG24B2 from RF-star is a RF Module with Frequency 2400 to 2483.5 MHz, Data Rate 125 Kbps to 2 Mbps, Supply Voltage 2.2 to 3.8 V, Current Receiving 4.4 to 5.1 mA, Current Transmitting 5 to 19.1 mA. More details for RF-BM-MG24B2 can be seen below.