... Tiny USB Bluetooth v.2.1 20M support Win7 Frequency band: 2.4 GHz Bluetooth protocol: up to v.2.1, data transfer speed up ... , flash program memory, and USB 1.1/2.0 interface Bluetooth 2.1 lower protocol stack and HCI Bluetooth 2.1 upper stack and profiles, including SPP ... , DUN, LAN, HSP, OPP, FTP, and SYNC USB 1.1/2 ...