HUAWEI FreeBuds 3i - Wireless Earbuds with Ultimate Active Noise Cancellation (3-mic System Earphones, Fast Bluetooth Connection, 10mm Speaker, Pop to Pair), White Earphone capacity: 37 mAh (minimum value) USB -C port Charging case: charged via a USB -C port Music playback duration: Approx. 3.5 hours (ANC off) Voice call duration: Approx. 2.5 hours (ANC off) Ultimate Active Noise Cancellation While the outward-facing mic is detecting ambient noise to actively counter with the anti-noise, the inward-facing mic is picking up the rest noise in your ears for further cancellation. HUAWEI FreeBuds 3i offers a thorough noise-cancelling experience for your immersive enjoyment. 3-mic System, Let the World Hear Your Voice It comes with two outward-facing mics to accurately pick up your voice while avoiding other environmental noises, and a third inward-facing mic receives the voice conducted inside your ears. Fits Your Ears, Fits Your Style Pair them with the flexible silicone tips that come in 4 different sizes for a comfortable and secure fit. Better shape, better seal, better sound. Pop to Pair, Ready to Start Pair HUAWEI FreeBuds 3i automatically with the pop-up window*when the charging case is open, and you are good to go. Battery status is also visible when pairing. Instantly enjoy your favorite music.. * Pop-up window only adapts to Huawei smartphones with EMUI10 or above. Reads Your Taps With built-in capacitive sensors on both sides, HUAWEI FreeBuds 3i presents convenient tapping features and accurate control that disregards unintentional touches.