Model: F9-5Colors: BlackBlueooth Version: 5.0Material: ABS/PlasticImpedance: 32OHMFrequency band: 2.4GHzWorking voltage: 3.0V-4.2VMicrophone Sensitivity: -42dBBattery capacity: 50mah for earphone, 2000mah for charging case Play Music Time 3-4 hoursTalk Time: 3-4 hoursPack included:2* Earphones 1* Charging Box1* USB Charging Cable1* User Manual