Bluetooth Version: V1. 2 / Class II Interface: USB V1. 1 Working distance: 0-20 meters Frequency band: 2. 40Zhz ~ 2. 48Ghz ISM band Data Rate: 1 Mbps Input power 5V from USB port Works with bluetooth enabled device LED indicator: single LED Size: 72 x 32 x 10mm Certificate: CE / RoHS Packing: 150pcs / CTN / 46 x 30 x 37. 5cm / 9. 2kgs