1、HiFi Stereo Headphones: The headset uses an advanced Bluetooth 0 chip that aims to deliver you superior sound quality with HiFi deep bass and crystal clear treble. 2、Deep Bass: Deep, accurate bass response, extended frequency range, rechargeable. Lose yourself in immersive music even in the lowest volume levels! 3、Fast and Stable: Our upgrade Bluetooth 0 technology ensures fast and stable connection to your Bluetooth devices and low latency during audio video streaming. 4、With Microphone: Headphones wireless provides high quality built in mic for hands free calling. No more worries about audio dropouts during phone calls and music listening. 5、Foldable and Stretchable: The earmuff imitates human skin texture, ensuring lasting comfort. They are foldable and stretchable, which allows you to find the perfect fit without constraint and excellent durability. Item Type: HeadsetMaterial: ABSSpeaker Diameter: φ40mmBattery: Lithium Battery (included) Battery Capacity: 400mAhBluetooth Version: 5.0Sound Channel: StereoNoise Reduction Ratio: 88dBFunction: Bluetooth + call, memory card, FM, AUXOperating Distance: Approx. 10m / 33ft (without barriers)Talk Time: 8-10 hoursCharging Method: USB 5VCharging Time: 2-3 hoursStandby Time: 15 hoursFrequency Range: 20Hz-20KHzApplicability: Can be used for PS4, for XBOX, mobile phones, laptops, desktops, etc.Available for Bluetooth connection, memory card, 3.5mm headphone jack