1.5W/10W, 433Mhz,option of 450-470Mhz; 2.range is 2-20KM in ... ×30mm 14InterfaceTTL, RS232, RS485user can choose15Reliable transmit distance10-20KMm Features:1.Power and receiving sensitivity ... Transmission power: 5W, RX current: <45mA, TX current:1.5A ... 4. Long transmission distance Within the range of visibility, It can transmit >20km when the antenna height ...