ISM Radio Modem Data throughput, RF: 2.4...115.2 kbps Data throughput, serial: 1.2...115.2 kbps Dimensions L x W: 75 x 35 mm Dimensions L x W x H: 75 x 35 x 135 mm Frequency: 863...870 MHz Operating temperature: -30...+70 °C Power supply: 4.5...36 VDC RF-Input sensitivity: -120 dBm Weight: 155 g Base frequency: 868 MHz Interface: RS-232 / RS-485 Range with visual contact max.: 7 km