Modulation mode: GFSK/FSK Working frequency: 433/470/868/915MHz Output power: 10 dBm(433/470MHz) and 5dBm (868/915MHz) Receiving sensitivity: -118dBm (433/470MHz @ 1,200bps), -116dBm (868/915MHz @ 1,200bps) Channel count: 8/16/32 Transmitting current: 38í+2mA Receiving current: 28í+2mA Sleeping current: 5í+2uA Baud rate: 1,200/2,400/4,800/9,600/19,200bps Interface mode: UART TTL/RS-232/RS-485 Power supply: DC +3.3V to 5V Working temperature: -25íµ to 75íµ Working humidity: 10% to 90% Dimension: 47 x 26 x 10mm Reliable transmit distance: 800m (AT-4 antenna 433MHz @ 1,200bps) 800m (AT-4 antenna 470MHz @ 1,200bps) 400m (AT-4 antenna 868MHz @ 1,200bps) 300m (AT-4 antenna 915MHz @ 1,200bps) Network topology: point to point and point to multi-point mode