Bluetooth headset ✔️ Adjustable headband ✔️ with control buttons ✔️ Supports Sd card (for mp3 function) ✔️ Rechargeable ✔️ Headphone port (for wired feature but AUX cable not included) ✔️adaptive noise cancelling ✔️Built-in Mic ✔️remote talk ✔️20 hours rechargeable battery ✔️battery fuel gauge ✔️auto on /off ♩ [Bluetooth 5. 0 & TWS Technology] -- most advanced Bluetooth 5. 0 true wireless headphones. The built-in high-quality sound chip provides you with the crystal clear high & low frequencies. Two interconnection pieces are creating great stereo and excellent bass surrounding sound. Fast and stable transmission without tangling. ♪[Power a Week of Listening]: Earbuds Using our high-efficiency power cells, delivers over 6-8 hours of wireless playtime from a single charge and an extra 20 hours from the compact charging case. ♫[Fast Pairing And Instant Set Up] Engineered with industry-leading Bluetooth technology, these wireless earphones keep precise and undistorted connection within 33ft (10m). They instantly connect to your iPhone, iPad, Mac, Android Smartphones and tablets. Just power them on, hold near your device and start getting lost in your music. ♬ [IPX5 Waterproof] -- resistant to sweat, water and rain. Ear hook design can be perfect for sports, jogging & gym exercise, watching TV, or sleep. ♬[What You Get And Quality Customer Care] 2× Bluetooth headphones(with Ear cap), 1× Charging Case (Charger NOT Included), Ear Caps(Size S/ M/ L, PLEASE try different sizes Ear Caps first to exchange better using experience.), 1× Micro USB Cable, 1× User Manual. Vealvion provides 18 months of Quality Customer Care to our customers. For any issue, please contact our customer service team for help, and we will be there within 24 hours.