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Features: Ultra-low latency, fast connection Advanced Audio Distribution Profile (A2DP) Enhanced Data Rate (EDR) Bluetooth Low Energy (BLE) 24-bit CRC Verify Adaptive Frequency Hopping(AFH) Specifications: Chip: Original CSR8510A10 Chip Bluetooth Version: 4.0 with EDR - data transfer rate up to 3Mbps Interface: Full speed USB 2.0 ISM Band: 2.402-2.480GHz Operation Range: Class II, up to 20 meters(65ft) Support Profile: Serial Port, Object Push, File Transfer, LAN Access, Personal Area Network, Audio Gateway, Headsets, HID, Keyboard, Mouse, HCRP (Printer Cable Replacement), PIM, Synchronization Profile, AVRCP Package Included: 1 x Bluetooth Dongle 1 x CD Driver(Installation Guide Included) Note: 1.Does NOT support adding Bluetooth functionality to home theater or automotive systems. 2.Does NOT work in car stereo systems or TVs. Does NOT work with Mac OS, i OS. NOT recommended for employer-provided computers. 3.Does not work with keyboard / mouse accessories based on 2.4G wireless technology 4.Most Windows 8/10,Bluetooth keyboard and mouse can plug & play without installing any external driver. 5.Windows 7 need install driver when you connect to audio device,such as Bluetooth headset and speaker. 6.It's better to set up playback devices and disable bluetooth hands-free and speaker audio to get much better sound quality.