GENERIC Ultra-Mini Bluetooth CSR 4.0 USB Dongle Adapter( Black:Golden) Important Note: When you connect headset or speaker,feel the sound like handsfree, please You have to Uncheck "Handsfree telephony" from the services setting on your bluetooth device -> Control Panel/Hardware and Sound/Devices and Printers -> select your device and right-click, open Properties, then go to Services tab and uncheck Handsfree Telephony. Marked as your default device in Control Panel -> Hardware and sound -> Change system sound -> Playback -> select bluetooth device and select set defaults. CSR V4.0 Dongle Support Bluetooth voice and date transmission Ultra-compact, easy carrying and space saving.  Experience stereo audio with Advanced Audio Distribution Profile (A2DP) support.  Bluetooth Low Energy (BLE) protocol support.  Up to 3 Mbps data transfer rate with Enhanced Data Rate (EDR) support.  Backward support classic Bluetooth V3.0/2.1/2.0/1.1  Bluetooth version: 4.0 with EDR - data transfer rate up to 3Mbps  ISM Band: 2.402-2.480GHz  Support Profile: Serial Port, Object Push, File Transfer, LAN Access, Personal Area Network, Audio Gateway Compatibility  Windows 10, Windows 8, Windows 7, XP, Vista ,2003, 2000,Me, Bluetooth-enabled devices, like iPhone, iPad, iPod,Samsung Galaxy,note ,smart phones,  tablets, keyboards, mice, speakers, printers, projectors,headsets & more  Package includes: 1 x Bluetooth USB Adapter 1 x Driver installation CD Warranty  3 - month warranty