Zigbee Carrier Frequency : 2400MHz to 2483.5MHz Modulation Method : GFSK,1Mbps, 0.5BT Gaussian Hopping : 1600 hops/sec, 1MHz channel space Receiving Signal Range : -84 to -20dbm Receiver IF Frequency : 1.5MHz center frequency Radio Range : 50m open air Dimensions : 95mm X 55mm X 15mm Interface : RS-232