Modulation mode: GFSK/FSK Working frequency: 433/470/868/915MHz Output power: 10dBm(433/470MHz),5dBm(868/915MHz) Receiving sensitivity: -118dBm(433/470MHz),-116dBm(868/915MHz) Channels: 8/16/32 Transmitting current: 38í+5mA 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 and RS-485 Power supply: DC +3.3 to 5V Working temperature: -25íµ to 75íµ Working humidity: 10% to 90% Dimension: 47 x 26 x 10mm Reliable transmit distance (AT-4 antenna): 800m(433/470MHz),400m(868MHz),300m(915MHz) Communication mode: half-duplex Network topology: point to point and point to multi-point