ORICO USB Dongle Unifying Receiver 4.0USB Bluetooth 4.0 Adapter for Windows, Linux, Raspberry Pi, Bluetooth and Stereo Headphones- Red BLUETOOTH ADD-ON: Ultra-Low Energy Consumption Technology; Suitable for computer desktops and laptops with USB ports that can connect to Bluetooth enabled devices. MULTI DEVICE SUPPORT - Supports Bluetooth speakers, headphones, headsets, keyboards, mice, and other devices COMPACT DESIGN - Extremely compact USB adapter. Safe to leave in for laptop travel. Energy efficient. WINDOWS COMPATIBLE - Automatic install through Windows Update in Windows 10 with default Bluetooth stack. Includes Broadcom Bluetooth stack for Windows 8.1, 8 and 7 (available separately for 10). Works with Raspbian and Ubuntu. 18 MONTH WARRANTY WITH LIFETIME TECHNICAL SUPPORT - All ORICO products purchased through Amazon include an 18 month warranty and lifetime technical support. If for any reason you are dissatisfied with your purchase, just let us know and we promise to make it right. The latest Ultra-Low Energy Consumption Technology is programmed in which also enables automatic sleep and awake modes. Compatible with Windows XP; Windows Vista; Windows 7; Windows 8; Windows 8.1; Suitable for computer desktops and laptops with USB Ports that can connect to Bluetooth enabled devices such as cell phones, tablets, speakers, headsets or headphones, mouse, keyboards; etc. Latest Bluetooth Specification v4.0 Class 2, compatible with Bluetooth 2.0/2.1/3.0/4.0. Supports dual mode, low energy consumption. Using the Broadcom BCM20702 chip, Transmission rate will reach to 3Mbps. Good compatibility and stable signal enable to support up to multiple devices simultaneously. Multiple Bluetooth devices supported The Bluetooth adapter built-in antenna design. The transmission will perform better within 10M distance barrier. And the 128-bit-AES security encryption is adopted for data packets to provide a high degree of encryption.