1. Bluetooth + MP3 function, support stereo music playback, phone calls. 2. Support all audio devices, Bluetooth functions, such as, mobile phones, tablets, laptops, computers, etc. 3. The 3.5mm audio jack provides a simple wired connection without the need for devices Bluetooth. 4. Allow you to accept or reject incoming calls anytime and anywhere. 5. USB charging, rechargeable battery, convenient and practical. 6. , foldable design, adjustable hinge length, comfortable to wear, easy to carry. 7. The for listening to music, watching and chatting online. 8. With SD/TF card inserted, you can still enjoy music anytime and anywhere without any Bluetooth device. 9. Give your children beautiful Christmas gifts, birthday gifts, year gifts. for listening music,watching movie, chatting online etc. Battery: 400mA Horn: 40 centimetres Functions: Add, subtract, Pause/play, MIC Time standby: 48/h Usage time: 24/h Frequency response range: 20-20000Hz Plug diameter: 3.5mm Sensitivity: 115dab/mW How to wear: Bluetooth headset, TF card is supported (TF card is not included, you need to buy extra) Colour:Blue Material:plastic Package Contents: 1 x Bluetooth Headset with Microphone Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.