DescriptionBluetooth V4.1 technologyHands-free calling on the goLong talk time and standby timeBuilt-in rechargeable batterySupport SIRI if you connect it with iPhoneEasy to installBrand & Model: 389Bluetooth: V4.1+EDRBluetooth Profile: HSP/Hands-freeOperating: Range Up to 10 metersFrequency Response: 2.4GHzTalk Time: Up to 20 hoursStandby Time: Up to 1000 hoursCharging Time: 3 hoursBattery Type: Rechargeable lithium batteryHow to use?1.Power on/offPower on: Press and hold the ON/OFF button for 4 seconds until you hear a ""Power on"" it will auto connect the phone which was paired.Power off: Press and hold the ON/OFF button for 4 seconds until you hear a ""Power off""2.Pairing(1) Ensure the speakerphone is under OFF mode (2) Pairing: Press and hold the ON/OFF button for 8 seconds until you hear the amp;quot;Ready to pairamp;quot;(when you holding the button hear a ""Power on"";, Please do not Release the button, keep holding until you hear the voice report ""Ready to pair""). The LED indicator will flash between red and blue alternately. It is now ready for pairing.(3) Activate your mobile phone's Bluetooth function and search for available Bluetooth devices by referring to your mobile phone user manual for details.(4) Select ""BT Speaker""from the list.(5) When paring is completed, the voice report Phone 1 connectedPackage:1 x v4.1 Bluetooth Hands-free1 x Car Charger1 x Clip1 x USB Cable