USAMS-US14 Series Dual Mic ENC Bluetooth 5.3 Noise Reduction TWS Earbud - Black Features: Dual-mic Array, ENC Function: Dual-mic array, accurate sound collection, effectively filter out environmental noise, makes calls smooth and clear AAC HD Decoding, Immersive Sound: 13mm space diaphragm loudspeaker, AAC HD audio decoding, makes music more full and rich in details Smooth Gaming Experience: Press 4 times to open the game mode, instantly boost transmission speed, and reduce latency to 60ms More advanced BT 5.3 chip, faster connection than previous versions, stronger anti-interference, and smooth sound Long Battery Life Endurance: 400mAh high-capacity charging case, can extend the working time of the earphone up to 35 hours Semi-in-ear design, ultra-light, comfortable to wear, and sensitive to touch Specifications: Brand: USAMS Model: USAMS-US14 BT Version: 5.3 SpeakerDiameter: 1.3cm Speaker Impedance: 32Ω SNR: >70 Earbud Battery Capacity: 40mAh Calling Time: About 5.5h C