Transsmission Rate: Bluetooth adapter supports maximum transfer rate up to 3Mbps and transmission distance up to 33ft/10m in open space. | Plug and Play: Win 7 need to install driver(CD included),most Win 8/10 can use this dongle plug & play without installing any external driver. | High Compatibility:Support 32bit/64bit Win 10/8/7/ Vista and XP,enables PC or laptop to connect bluetooth-enabled devices, like smartphones, mouse,speakers,headsets.Not work with Mac OS,Car stereo systems or TVs | Low Energy: USB bluetooth dongle applies the latest bluetooth 4.0 with low energy (BLE) technology and it is backward compatible with bluetooth V3.0/2.1/2.0/1.1 | Extremely Small: Small size allows you to leave it on laptop or pc,no need to remove,it seamlessly gets plugged into a computer/laptop without blocking surrounding usb ports,save space