The S4 Portable guitar amp can play for up to four hours at a peak output of 10 watts. Even so, its tiny design makes it easy to handle with one hand.You can go everywhere with this mini amplifier, just plug and play. 

• Built-in battery: Fully rechargeable
• Product name: S4 guitar mini amp 
• Main material: ABS,aluminum alloy
• Charge method: type-c (5v in) 
• Speaker power: 10 watts x1 speakers
• Power source: battery powered 
• Compatible devices: electric guitar

• Guitar input: 1/4 inch plug jack 6.35mm 
• Headphone output: 1/8 inch plug jack 3.5mm 
• Switch: clean/DIST.、power on/off (bluetooth on/off) 

Knobs: 

• Master vol.: control the master volume 
• Gain vol.: control the amount of gain
• Tone: control the tone 
• Level: Controls the overall signal volume
• Bluetooth: S4
  
  
• Item size: 145*95.5*102.5mm
• Item weight: 0.68kg 
• Package size: 15.6*10*10cm
• Package weight: 0.77kg