FANTECH Wireless Earphone Wave 11 TW11V2 Bluetooth: 5.3; 13mm driver size Response Frequency: 2.402-2.480 GHz A microphone Sensitivity: -38 decibels 112 dB is the speaker sensitivity. Plug: Type C Play Duration: Up to Five Hours With the FANTECH Wave 11 TW11V2 Wireless Earbuds, You Can Show Off More