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. How to use: Turn the Bluetooth function of the mobile phone and turn the Bluetooth of the headset at the same. When the model number is displayed below the Bluetooth device of the mobile phone, you can connect it. Parameter introduction： Wearing way: in-ear type Bluetooth Version:4.1 Color:White,blue,red, Product Usage: Music Appreciation|| Consumption||Portable Withstand power: 10 mw Frequency range: 200Hz-20000KHz Impedance: 32 ohms Sensitivity:119db Plug size: 3.5mm The function, style and appearance of the Jinding series are humanized. Package lists: 1* Bluetooth Headphone 1* USB charging cable