PERFORMANCE Power Output: 500mW@5V(Default), 1W@9V(customized) RF Line-of-sight Range: 4000m@1200bps, 2000m@9600bps RF Effective Rate: 1200/2400/4800/9600/19200/38400bps optional Receiver Sensitivity: -124dBm@1200bps, -118 dBm@9600bps Supply Voltage: +4.75~5.5VDC Transmit Current: <400mA@500mW, <500mA@1W Receive Current: <40mA Sleep Current: <5µA optional ex-factory Frequency Band: 433MHz(Default) 400MHz~470MHz(customized) Channel: 8(Default), 16/32 (customized) Default Interface: COM1:TTL/UART,COM2:Non-Standard RS232 or RS485 Size: 53mm×38mm×10mm Weight: 34g Antenna Base: 50Ω Operating Temperature: Industrial: -35℃~+80℃(TCXO crystal) Commercial: -20℃~+60℃ Frequency Stability ±2.5ppm Industrial ±10ppm Commercial