WHITE FANTECH WAVE 14 TW14 TRUE WIFI EARBUDS Comfortable & Lightweight Custom-Tuned Driver for Bluetooth 5.3 Version Touch Control for Digital Displays Version 5.3 of Bluetooth Size of driver: 8mm Range of effect: 10 m 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 True Wireless Earphones by Fantech Wave 14 TW14 - White for More Earphone Display More