Description: The versatile headset combines Bluetooth, card, MP3 player with hands-free support. With this product, you can enjoy great wireless music. It can also be used as an MP3 player because it supports memory cards (MicroSD / TF card). In addition, if your music player (such as MP3 / MP4, etc.) does not have Bluetooth, you can connect your music player to your headphones with the included 3.5 mm audio cable to enjoy your favorite music. 4-in-1 multi-function stereo Bluetooth headset: Wireless stereo Bluetooth + card MP3 player + wired headset function. Pairs with almost any Bluetooth-enabled audio/music player device, such as smartphones, tablets, laptops, and more. Designed with two high-end speakers, built-in Mic, and a powerful bass system for superior sound. The best choice for listening to music, watching movies, chatting online, etc. Supports hands-free features to make it easy to receive calls while traveling. Specifications: Material: plastic. Bluetooth version: 4.1. Operation Distance: 10m. Support:Bluetooth, Aux in, TF Card. The output frequency: Class 2. USB charging cable: AC input 110-240 V DC input 5 V. Frequency: 2.4 GHz 2.4835 GHz. Color: show as pictures. Note: There might be a bit color distortions due to different computer resolutions. There might be a slight errors due to different hand measurement. Package included: 1 * Headset. 1 * USB cable.