Describe: Can be connected to mobile phones, notebooks as music players Can be connected to a computer as a computer player with perfect sound quality Can insert memory card, USB, as MP3 player Support Bluetooth playback or TF card playback or U disk playback Pre and hold the back or forward button to adjust the volume. Easy to use portable and mini size. Specification: Product color: black, red, blue Material: ABS or Metal Whether to support radio: support Whether to support TF card: yes Audio Input: No Transmiion distance: 10 meters Micro Charge Input: DC 5V or 1000 mA Battery capacity: 3.7 V or 300 mA Charging time: 2 hours Music playing time: 1-2 hours Acceories: charging cable Notice 1.When charging , the red light is always on, and the charging room canbe closed within 2-3 hours 2.Power on - Mobile Search Bluetooth- BT- Speaker.click the link(the sound will tinkle once the connection is succeful) Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.