1、Bluetooth 0 provides a strong connection and is compatible with most Bluetooth-enabled devices. 2、The 40mm large aperture driver provides high‑fidelity audio and powerful bass, giving you a better experience. 3、It has foldable and retractable, plug card playback, FM radio, support 5MM jack, noise reduction, heavy bass stereo function. 4、Ergonomically designed, it fits your head perfectly. Memory foam protein ear cushions can completely cover your ears and reduce pressure for maximum comfort. 5、Stable transmission within a distance of 10m/38ft, low power consumption, can talk and play music for 8‑10 hours after charging for 2 hours, and the standby time has reached 120 hours. 1 x Headset  1 x USB Cable1 x AUX Audio Cable1 x Manual Item Type: Bluetooth HeadsetMaterial: ABSDriver Size: 40 mmProduct Weight: Approx. 404gImpedance: 32 OHMBluetooth version: Bluetooth 5.0Bluetooth use frequency band: 2.4GHzPower level: CLASS IIBluetooth distance: 10 m/ 32.8ft without barriersFrequency response: 20-20000HzWith A2DP/AVRCP high-quality stereo audio transmission and remote control protocolCharging time: About 2 hoursTalk time: About 8-10 hoursMusic time: About 8-10 hoursStandby time: About 120 hoursBattery capacity: 250MAH (polymer lithium battery) (built-in )Charging power supply: DC5VCompatible mobile phones: Compatible with for Android / IOS / Microsoft / Symbian 99% mobile phones with Bluetooth functionOperating instruction: Automatically enter the Bluetooth mode after booting, turn on the Bluetooth function of the smart device, search and successfully pair to use.