Frequency range: 902-928MHZ or customized FM mode: FHSS or fixed frequency, set by the software RF output: 20-30dBm adjustable Antenna connection qty: 4 SMA antenna ports, 7dbi circular polarization antenna, the height of antenna adjustable Communication interface: LAN RS232 RS485 Wiegand26/ 34 Communication rate: Serial port 9600^ 115200bps RJ45 10Mbps Power dissipation: average< 20W EAS alarm: 3s sound and light prompt GP I/ O interface: 12 pin + 4 pin Reliable firmware upgrade: Extensible upgrade mechanism Application software interface: Provide with API SDK and VC, VB, Java application routines Reading distance: 1.5-3m equipped with 7dbi antenna ( tag dependent) Air interface: EPC global UHF ISO-18000-6C EPC G2 TK900 Dimension: 180( L) * 35 ( W) * 20( H) cm Power supply: 220V AC input Weight: 20KG Humidity: 5% to 95% , non-condensing Protection grade: IEC IP51 Operation temperature: -20 C to + 60 C Storage temperature: -40 C to 80 C