... : Put iPhone4/4S into the slot of BT Phone ,iPhone will automatically search for Bluetooth devices. The blue lights and ... , 7s later the telephone automatically start Bluetooth and connect with the iPhone. No need to any operation, use it directly.Note ... indicatorsBluetooth protocol versionBluetooth 2.1+ EDR version, backward compatible with V1.1,V1.2 versionSupport the Bluetooth protocolHSP1.1, HFP1 ...