cheap bluetooth headset with BQB Specification:Bluetooth standard:V2.0 + EDRcompatible:V1.0 V1.1 / V1.2 /  Transmission: class2 Working range:                10M  Frequency range :        2.4-2.48Ghz  Talk time :≥2.5 hrsCharging time:<1.5 hrsStandby time:≥ 80 hrs Charger power :                                      AC input 110-240V  DC output5V  Features:1). Either the  ear hook or the ear pulg.2). Support bluetooth headset,handfree profile3) .Redial the last call ,Reject call.4). Volume adjustable.5). LED indicates connection. Function:Call Receive              : Accept incoming callCall End                     : End an active callCall Reject                 : Reject an incoming callVoice Dial                    : Support voice dialingLast Number Redial      : Redial last called numberVolume Adjust              : Volume adjust increase/decrease in stepLow Battery Indication  : Emits a short beeps tone  at 30 sec interval and flash RED LED when low battery leve