1.Mini Speaker 2.Colorful LED light 3.FM function 4.Support TF card 5.Portable Speaker Technical parameters: 1. Output: RMS 3W. 2. Frequency response: 90Hz~ 20KHz 3. SNR: > 85dB. 4. Impedance: 4 ohm. 5. Power supply: 550MH Lithium battery. 6.Charging power supply: USB 5V 7. 40mm internal magnetic, high- quality aluminum and iron boron speaker. 8. Built-in rechargeable lithium battery, when the maximum playing, support for 2 hours. 9. Colorful LED light. 10. USB charging. 11. FM radio, Auto search. 12. Support TF card, mobile phones, computers and other external sources.