V4.0 version ,Website:http://www.smartcoolproduct.com,JianrongSupports Bluetooth Headset musicSupports music songSupport the last number redialVoice reporting function.Bluetooth Headset operation voice prompt function.Supports Micro message, vehicle navigation, QQ voice software.Conversation 4-6 hours, 4-5 hours, listening to music, and 150 hours of standby time.Certificates: CE,ROHS,FCTransmission distance: 10mFrequency Response: 20Hz-20KHzCharging Interface: Micro USBIP Grade: IP67?