Function: Support music Bluetooth version: 4.2 Package type: official standard How to use: head-mounted Transmission radius: 10m Whether single or double ear: bilateral stereo Transmission radius: 10m between the left and right cavities of the earphone Connection method: Wired connection headset and playback device Connection method: Bluetooth connection Features: 1 latest 40mm neodymium magnet. Stereo field. Excellent analysis ability and powerful low frequency characteristics. HI-FI, CD sound quality 2. JL chipset. Wireless V4.2, low power consumption and high transmission rate. Support multiple protocols. 4. Earmuff design, choose skin-friendly protein earmuffs and hanging earmuffs. Comfortable. 5. Fashionable design. The color of metallic paint, high-end texture. 6.Metat wiretapping headband, sturdy and durable. Foldable headband, easy to use 7. Three buttons, used to control call/music volume, etc., and with audio cable for MP3. 8. Support equipment: mobile phones with Bluetooth function, iphone, notebook, ipad, etc. 9. The best choice for listening to music, watching movies, online chatting, etc. 10. With SD card slot, support FM radio, a small SD card is enough to enjoy music anywhere, anytime.