Output Watt: 3W Frequency Range: 25Hz~20KHz Sensitivity: 600mV50mV Impedance: 4 SNR : =70dB MP3 Distortion: 0.3% Battery: Li Batt 3.7V / 1500mAH Recharging Voltage: USB / DC 5V Dimensions: (3.86 x 5.47 x 1.81) / (9.8 x 13.9 x 4.6)cm (L x W x H) Weight: 12.73oz / 361g Package Dimensions: (6.34 x 5.08 x 2.05) / (16.1 x 12.9 x 5.2)cm (L x W x H) Features: Clean and overdrive tone settings Bass treble controls Lighted power switches Well-equipped to deliver plenty of power Normal volume, gain and drive switch Overall dimensions With volume control and tone control knobs design Easy to use and play Note:This product can work with TF card function,but without the TF card.Need to order separately. Please read the instruction carefully before using the product. Manual Click here Package Includes: 1 x Guitar Amplifier 1 x USB Data Line 1 x User Manual