Details Big Power 20W HIFI Portable Wireless Bluetooth Speaker Stereo Bass Soundbar TF FM USB Subwoofer Column for Computer TV Phone Product Features - 1. Adopt Bluetooth V4.0 version 2. Use 4 full-frequency speakers 3. USB interface; U disk audio input function 4.TF card audio input function 5.3.5mm audio input 6.FM radio function 7. Use micro charging port 8. Can control the volume addition and subtraction 9. Can control songs up and down song 10. Can control song pause and play Product parameters - Bluetooth version - Jerry V4.0 Battery Type - 18650 polymer battery Battery capacity - 2000mA Use time - about 3.5 hours Output power - 4 euro * 5W Frequency response - 20Hz-20KHz Transmission frequency range - 2.402G-2.480G Signal to noise ratio - ±80db Transmission distance - 8-10m Charging type - microUSB 5V/1.5A Size - BS28B - 550*50*50mm ; BS28A - 330x50