SPECIFICATION 1. Audio format supported: MP3 2. Max card input capacity supported: 16G 3. FM radio frequency: 87.5-108MHz 4. Speaker: Quantity: 1pcs; Power: 3Watts; Resistance: 4 Ohms; Diameter: 52 MM. 5. Audio output sound frequency: 150Hz-18 KHz 6. Max audio output distortion ratio: 0.5% 7. Signal noise rate: 80dB 8. Earphone output sound frequency: 150Hz-18 KHz FEATURES: 1. With original minion sound in the movie when turn the unit on. 2. Support TF card and USB stick plug mp3 music play. 3. With FM radio function. 4. Built-in high capacity lithium battery. 5. MINI/5Pins USB charging socket. 6. With blue led charge indicator. 7. 3.5mm Aux in jack. 8. 1*3W 4Ω, Φ52mm strong magnetic vibration hi-fi speaker. 9. Built-in low consumption and tiny distortion rated digital amplifier of 3W. 10. Universal 3.5mm earphone output jack. 11. Multifunctional knob buttons: MODE (FM/TF CARD/USB/LINE IN/LED), VOL-/PREV, VOL+/NEXT, PLAY/PAUSE.