ORICO Mini USB Bluetooth 4.0 Adapter for Windows XP / Vista / 7 / 8 / 8.1 / 10 (BTA-408) Software: BCM20702 Interface: USB Transfer Rate: 3 Mbps Transfer Distance: 65.6 feet (20m) Supported System: Windows XP / Vista / 7 / 8 / 8.1/10 Mini dimension, stable signal Add Bluetooth to normal computer It is inconvenient for normal computer without Bluetooth. Luckily, this little Bluetooth adapter which is small, beautiful and easy to carry, can make normal computer have Bluetooth and apply it. Broadcom high-performance controller Fast and stable transmission Built in BCM20702 controller, transfer speed is up to 3 Mbps which means it only take 8s to transfer a 3M song; good compatibility and stable signal; support stereo Bluetooth, can connect multiple devices. Dual mode, low consumption Even can't feel energy loss Conform to Bluetooth 4.0 specification and backwards compatible with Bluetooth 2.0 / 2.1 / 3.0; support dual mode; consumption is lower 90% than old version, saving more power. 20m long-distance transmission Signal is full of the room Built in antenna, Bluetooth 4.0 specification allows transferring from 0 - 20m, better in 10m; 128-bit-AES security encryption provides high safety and acceptability for data packet. Intelligent sleep and wakening Reduce energy loss for Bluetooth devices Support low delay and fast connection; intelligent sleep and wakening reduce energy loss for Bluetooth devices. 24-bit CRC calibration resists interference and adaptive frequency hopping decreases crosstalk, signal more stable.