Features: 1.Support for multi-protocol for harmony Software driver, for GAP/A2DP/HID OVER GATT/HSP V1.2/AVRCP 1.4/HFP V1.5/FTP 2.2. 2.Realize the connection between the computer and other devices with Bluetooth protocol. Compatible with for Window XP/Msta/7/8/10 (For MAC OS system is not supported). 3.Compatible with for Windows systems. When the driver is not installed, only the phone/tablet can transfer text/photos; after installing the full version of the driver, the computer can be connected to the Bluetooth headset/speaker. 4.Double gold-plated treatment, exquisite appearance, durable and wearable, better than other materials, more delicate, shiny, and more stable signal. 5.With the original CSR8510 chip, the signal is stable and stable, dual mode, low power consumption and better performance. specification:Item Type: Adapter Product Material: High Strength ABS Material Product Color: Black / White / Red / Blue (Optional) Product Chip: CSR8510 Product Interface: USB Interface Transmission Rate: 3Mbps Transmission Distance: Approx. 0-20M / 0-66ft (Recommended within 10M) Driver Software: CSR for Harmony Wireless Software Stack Compatible System: For Windows XP/Vista/7/8/10 (Not supported for IOS device transfer file/audio) PackageList:1 x Bluetooth Adapter NoteBluetooth 4.0 Adapter version statement: Compatible with 2.0, 2.1, 3.1, 4.0 Bluetooth devices, not compatible with Bluetooth 4.0 or higher.