Work voltage: DC 3.5V ? 5 V Standby current: < 80mA ( EN high level) Sleep current: < 100uA ( EN low level) Operating Current: 260mA @ 3.5V ( 26 dBm Output 25 C) ; 110mA @ 3.5V ( 18 dBm Output 25 C)  Start-up time: < 100mS Operating Temp: - 20 C - + 70 C Storage Temp: - 20 C - + 85 C Operating Humidity: < 95% ( + 25 C) Protocol: EPCglobal UHF Class 1 Gen 2 / ISO 18000-6C Working frequency: 902Mhz ? 928Mhz; 865MHz ? 868MHz( Optional) Maximum output power: 18-26 dBm Output power accuracy: + / - 1dB Output power flatness: + / - 0.2dB Output RF Connector: I-PEX Receive Sensitivity: 50pcs/ sec. Label buffer: 200pcs label @ 96 bit EPC Tag RSSI: support Communication interface: TTL Uart interface, Wiegand26/ 34 interface GPIO: 2-channel input 2-channel output ( 3.3V level) Communication rate: 115200 bps Default and recommended) , 38400bps Heat dissipation method: Air cooling ( no external heatsink)