Marked as your Default device in Control Panel -> Hardware and sound -> Change system sound -> Playback -> select Bluetooth device and select set Defaults. 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. Up to 33ft/10m, wireless data exchange, audio Music Stream Enhanced Data Rata (EDR) compliant for both 2 Mbps and 3 Mbps modulation modes with gold plated connector.

Supports A2DP stereo playback, Safe to leave in for laptop travel Newest Bluetooth class 2 Smart Ready specification with v 4.0 low energy. Specifically, works with Microsoft's new Bluetooth 4.0 Low Energy support in Windows 8 and later. Supports Bluetooth stereo headsets and more with built-in Windows 10 and 8 drivers or using the included drivers for Windows 7 and earlier.

Backward compatible with Legacy Bluetooth Equipment Bluetooth 3.0, 2.1, 2.0 and 1.0 Equipment, Improves Bluetooth support for Windows 10, 8.1 /8, 7, Vista, XP, 32 bit and 64 bit. This adapter creates cable-free connections between PCs and other Bluetooth devices such as Bluetooth enabled headsets, speakers, cell phones, keyboard or mouse and more (with Microsoft built-in drivers) at speeds of up to 3 Mbps.

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