SoundBot&reg; SB341 Bluetooth 4.0 USB Adapter Universal Plug and Play Dongle Class 2 Transmitter (Newest Bluetooth Version Available) Ready Adapter w/ 3Mbps Data Transfer Rate and 10 meters Range, Compatible w/ Windows WIN8 WIN7 Vista 2003 XP 2000 Me 32/64 Bit and Wireless USB 2.4GHz Communication distance: 30 feet or 10 meters with free line of sight Modulation: 2.4G Direct Sequence Frequency Hopping (FHSS) Transmit power: Class 2 level Slick Silver plated connector Size and weight: 22x18x7 mm 2.5g