More Details: Features: Built-in 4000mAh lithium battery. Large capacity、 you can listen to the music all the day.  Dual horns design、 has stereo sound.  Elegant and beautiful design like a work of art. Hands-free call、 relax your hands.  Support to 32G TF card and USD flash drive playing. Still listen to music without Bluetooth function. Also can listen to music with a headphone. More functions. It is more convenient.  Using Guide: 1. Radio mode: long press the play\/pause button to switch to the radio mode. 2. USB flash drive\/TF card: auto switch mode after plug the TF card or USB flash drive. Specifications:          General Specification             Brand Name        ZEALOT             Model Number        S2             Color        Black、 Red、 White、 Blue             Product Weight (kg)        0.5KG             Dimensions (cm\/ inch)        220*70*70mm           Technical Parameters             Bluetooth Version        4.0              Transmission Distance        10m             Battery Capacity        4000mAh             Speaker        4Ω             Output Power        3W             Charging Time        3-4 hours             Music Time        15 hours             Function        Hands-free\/TF card\/U Flash Drive\/radio\/AUX audio\/Audio Output     Package  Included:                  1 X Zealot S2 Bluetooth Speaker            1 X Charging Cable            1 X English\/Chinese Manual