Much Better Sound - Powerful speaker with the BT 5.0 technology. High quality built-in microphones software and HD sound technology, offer you high fidelity stereo music with deep bass and crystal clear speech when you listen to music or watch movies. Hand-free call & Built in Mic - Provide a quick and stable connection with your BT enabled devices like cell phones, tablets, PC, TVs within 33 feet, with a high-quality built-in microphone for hands-free calls, which is convenient for you to free yourself from wires. Both Wireless and Wired Mode - BT headphones can work well both in wire and wireless mode. Battery can be used 20-hours music time/ talking time in a single charge for wireless mode. You can also use it as a wired headphone with the provided audio cable so the headphones will never power off. Upgraded Soft Ear Cushions - Comfort with the professional protein earmuffs, More durability and comfort, enjoy high-quality, long-listen comfort, skin texture, light weight, comfortable around-ear fit you can wear all day long. Gentle Reminder: please take off the headphone every 2-3 hrs to get your ears relax, in order to get better hearing enjoyment, and keep the head comfortable. We offer good customer service. If you have any question, please feel free to contact us. Our Bluetooth headphones is a amazing headphone designed for a happy life, It is suitable for everyone, grown-up, students, kids or teenagers. It is a great option as a gift to your loves as you can share the joy to you friends and family. Immersive Hi-Fi SoundDesigned for an excellent listening experience, Bluetooth headset with CSR chip and around-ear cushion design can provide robust, immersive and Hi-fidelity sound. Advanced CompatibilityThe Bluetooth headset can easily and quickly connect with smart phones, tablets, TVs and other Bluetooth devices within 33 feet, bringing you crystal clear sound effect. Please make sure the driver software of receiving adapter is fully updated when connected to PC or laptop, and you need a separate Bluetooth adapter when connected with TV. Foldable and Portable DesignThe foldable design makes it easy to store them when not in use or during travels. The stainless steel slider headband allows you to find the perfect fit and provide excellent durability. Dual mode: Wireless &WiredIn the wireless mode: With a built-in Lithium-ion polymer rechargeable battery which provides 10 hours' continuous wireless playback and let you get rid of the tangled cables on the move.In the wired mode: Used as a wired headphone with an audio cable. Product SpecificationBluetooth Version: 5.0Range: 33 feet (10 meters)Talking Time: Around 10 hoursStand-by Time: Around 250 hoursCharging Time: 4 hoursCharging Voltage: 3.7VBattery Type: Rechargeable lithium polymer.Battery Capacity: 420mAhWeight:0.55lbs