Grandstream's USB RFID card readers are to be used with the GDS3710 IP video door stations. This USB RFID card reader can be installed anywhere and connects via an USB port to any computer. With Grandstream's free GDS manager software the card reader's activity can be tracked, monitored and managed. The device is fully powered through USB and offers a built-in antenna with a card-seeking mode. 

RFID Verification Tool for GDS3710, GDS3705