... Rich interface: standard RS-232, TTL, and RS-485 3.Carrier frequency: 433mhz ,868mhz,915mhz or others Features: Carrier ... of customersBaud rate: 1,200, 2,400, 4,800, 9,600, 19,200bpsInterface format: 8N1/8E1 user-defined or ... supply: 5V DCModulation: GFSKTransmission distance: 5km (BER: 10 to 3@9,600bps)Size: 80 x 45 x 19mm (without antenna port ... 2-3km range data transceiver ,rf module ,high speed