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Working frequency: 430~450MHz; Serial port£¬ supports 1200 / 2400 / 4800 / 9600 / 19200 / 38400 / 57600 bps; Low power consumption£¬ 3.5uA in sleep mode; Up to 2W (+33dBm) transmission power; Data buffering£¬ supports 512-bit every time;10cm antenna; Up to 8000 meters transmission range Working voltage: 2.1~3.6V and 4.8~5.2V; Temperature: -40~85'C; Humidity: 10~90%; Transmission speed: 1K£¬ 2K£¬ 5K£¬ 10K£¬ 20K£¬ 40Kbps; Transmission current: 85mA@3.3V / 1500mA@5V; Persistent current: 25mA@3.3V / 352mA @5V; Max. sensitivity: -121dBm@1Kbps; Configuration modification: 300k cycles Integrated STM8L101 processor; With Si4432B1 chipset; Easy operation; Perfect for DIY project.