This product uses the standard Bluetooth chip with 10M Bluetooth transmission distance. It supports iPhone, iPad, mobiles and MP3, MP4 with Bluetooth stereo function. Features: Built-in long-lasting lithium battery. Convenient to users. Users can use it in bedroom or anywhere freely to enjoy the music. Use class D miniature digital amplifier circuit with high-performance, low-power consumption. With six functional operations, including the audio switch, play/pause, volume+/-, previous, next. With a 3.5mm universal audio interface that supports for multiple audio player Mini USB charging interface design. Users can USB interface of the PC device, or USB power adapter to supply power. Parameters: Frequency: 20Hz-20KHz SNR: 80Db Input voltage/current: DC5V/500mA Battery capacity: 1000mAh Speaker power: 5W Bluetooth transmission distance: Retail Package Included: 1 x Bluetooth Speaker 1 x Charging Cable 1 x Audio Cable 1 x User Manual Note: Use the Bluetooth speaker button, you can adjust the volume. Only Bluetooth device supports this function.