Features: 1) Built in speaker, work without headphones when you plug it into the guitar, perfect to take around (rechargeable) to play with others or outside. 2) It has a standard guitar input jack that accepts a standard 1/4" guitar cable 3) All-in-One Solution: - Guitar amp (with overdrive and tone control) - Microphone input - Headphones out - Aux input (for mp3 player, phone or even extension speaker for PC / Laptop) - Embedded mp3 player (5 EQ options) - Embedded recorder (can record, all sources at the same time, guitar, mic and aux!) - USB sound card Specifications: 1. Output Watt: 5W 2. Frequency Range: 25 Hz – 20 kHz 3. Sensitivity: 600mV +/- 50 mV 4. Impedance: 4 5. SNR: >= 70 dB 6. MP3 Distortion: 0.3% 7. Battery: Li Battery 3.7V / 1500 mAh 8. Recharging Voltage: USB/DC5V 9. Dimension: 98 x 139 x 46mm 10. Weight: 260g 1 * Mini guitar Amp 1 * USB Cable