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 connector Communication interface: LAN RS232 RS485 Wiegand26/ 34 Bluetooth IEEE802.15 Communication rate: Serial port 9600^ 115200bps RJ45 10Mbps Bluetooth 1Mbps Reliable firmware upgrade: Extensible upgrade mechanism Power dissipation: average< 20W Application software interface: Provide with API SDK and VC, VB, Java application routines Reading distance: 1-3m equipped with 2dbi antenna ( tag dependent) Air interface: EPC global UHF ISO-18000-6C EPC G2 ISO-18000-6B TK900 Dimension: 190( L) * 177 ( W) * 75( H) mm Power supply: Equipped with 220V AC quick charger, rechargeable lithium battery 3.0Ah( 18V) Weight: 1.5KG Humidity: 5% to 95% , non-condensing Protection grade: IEC IP53 Operation temperature: -20 C to + 60 C Storage temperature: -40 C to 80 C