... coin, the length is 18mm only. Different colors are available. 1. Insert and play, no need to connect the power, supporting all ... or chatting through MSN/QQ/SKYPE. 14. Own audio gateway. 1. CSR case, compatiable with bluetooth v1.2, v2.0+DER ... , v2.1+EDR version, compatible with USB V1.1, v2.0. 2. Operation freguency band: From ...