Zoook Lava Earphone with Mic

HD Sound: : Yes Bluetooth Version: : V5.0 Bluetooth Profiles: : AVRCP/HFP/HSP/A2DP Speaker Impedance & Size:: 08mm ; 32Ω Battery Display: : Yes Frequency Range: : 2.402GHz-2.480GHz RF Frequency:: Maxim 4dBM /Class II Speaker Frequency Response: : 20Hz-20KHz Sensitivity (dB): : >90±3dB Operating Distance: : 10-15 meters Water-Proof: : IPX 4 Earphone battery:: 3.7V, 50mAHx2 Charging Dock battery: : 500mAh Talk time/music time: : 20 hours* Charging Time: : 1.5hrs Standby Time: : 100hrs Charging Jack: : Type C USB Input Voltage: : DC5±0.25V Weight:: 4.3g (Ear buds) ; 40g (Charging case)