Bluetooth Headphones Over-Ear Stereo Wireless Headset Features: Bluetooth function: suitable for mobile phones for Bluetooth connection. The mobile phone supports music playback, answering and call functions. With effect: This headset supports a variety of sound effect adjustments, so that the sound effects can be fully utilized! MP3 playback function: You can insert a card (mobile phone card) to play music. You can plug a earphone into the card without a mobile phone to play music, pause, adjust the volume, etc. Supports wired connection with mobile phones and computers: The headset does not need to use batteries to connect to mobile phones and computers via wired connection. It uses a standard 3.5mm plug and can be used with both mobile phones and computers. It is really a two-pronged approach. Built-in battery: It uses a rechargeable physical battery, which can be used for listening to music for 8-10 hours, and the charging is 3-4 hours. It has built-in direct charging and is not removable. Product Description: Wearing way: over-ear type Model number: HZ08 Usage distance:＞ 10 meters Blue fan edition: 4.2 Battery capacity: 300mAH Standby time: ＞120h Communication time: 7-9h Power input: DC5V200mAH Charging time: 2h Acceptance rate: 10 mw Frequency rate: 200Hz-20000KHz Inhibition: 32 Ouya Sensitivity: 119db Heat size: 3.5mm Product Suitable: Suitable for your own use Package lists: 1* over-ear Bluetooth Headphone 1* USB charging cable 1* User Manual