Technical Details: Chipset: CSR 8510 Host Interface: High speed USB2.0 interface Bluetooth Specification Class 2 Bluetooth v 4.0 Smart Ready Adapter with low energy technology Backward compatible with Bluetooth V3.0/2.1/2.0/1.1. Offers high speed up to 3mbps wireless transmitter enables long range connectivity up to 10m. Frequency Band: 2.4GHz ISM (Industrial Scientific Medical) Band