The PAN1783 from Panasonic Corporation is a RF Module with Frequency 2402 to 2480 MHz, Data Rate 125 kbps to 2 Mbps, Supply Voltage 1.7 to 5.5 V, Current Receiving 2.7 to 3.1 mA, Current Transmitting 3.4 to 5.1 mA. More details for PAN1783 can be seen below.