Here is the specification about the UHF RFID Reader-DL910:
(Over 6Watt RF output power)
Protocol: ISO18000-6B or ISO18000-6C (EPC G2)
Working frequency: 902MHz-928MHz or 868MHz or 860MHz-960MHz
Working mode: FHSS or fixed frequency pulse transmitting (set by software)
Transmit power: 20dBm-30 dBm(set by software)
Read speed: The average read time for single card is less than 10ms per 64 bits
Reading range: 8m-15m(according to tag and environment)
Write speed: 8bits less than 30ms
Write distance: 4m-7m(according to tag and environment)
Read prompt: Buzzer
Support Port: RS232 or RS485 or Weigand26/34 or Trigger or ICP/IP
Power supply: DC+9V,4A
Dimension: 450mm*450mm*60mm
Weight: 3700g

You can visit http://www.rfid-in-china.com/products_702_1.html for more info about UHF RFID Reader .