Black True Wireless Earbuds by FANTECH Wave 14 TW14 Comfortable & Lightweight Custom-tuned Driver Digital Display Touch Control for Bluetooth 5.3 Version Version 5.3 of Bluetooth Effective range: 10m; driver size: 8mm Response to frequency: 20 Hz–20 kHz It is sensitive to 102 + 3dB. A resistance of 32 ± 15% Ω Sensitivity of the microphone: -42 dB Listening Duration: 6 hours at 50% Standby Time for Volume: Up to 120 hours Time needed to charge: about two hours Earphones 40mAh batteries per charging case 350mAh battery Plug for charging: Type-C For more earphones, try the FANTECH Wave 14 TW14 True Wireless Earbuds in Black. Display More