Specification: Item Type: Speaker Material: ABS + Cloth+ Hardware Built In Polymer Lithium Battery: 800mAh S/N Ratio80dB Basic Function: USB + AUX + FM + Bluetooth Playing Time: 5 Hours Package List:1 x Speaker1 x Charging Cable About this item 10m Transmission Distance: The distance is different due to environmental factors and different mobile phone Bluetooth devices. Stereo Sound: 360 degree stereo surround, giving you an immersive sense of reality and better music experience. High Definition Sound Auality: Built in noise reduction, listen to high definition music anytime, anywhere. Long Use Time: Built in high quality polymer battery, longer charging and discharging life allows you to listen to enough at a time. Special Function: Provides a series connection function, which allows two speakers to play at the same time. 10m Transmission Distance: The distance is different due to environmental factors and different mobile phone Bluetooth devices. Stereo Sound: 360 degree stereo surround, giving you an immersive sense of reality and better music experience. High Definition Sound Auality: Built in noise reduction, listen to high definition music anytime, anywhere. Long Use Time: Built in high quality polymer battery, longer charging and discharging life allows you to listen to enough at a time. Special Function: Provides a series connection function, which allows two speakers to play at the same time.