Like a guitarist control the volume knob ,cut off he sound head, sound like a violin
Full metal shell
Very small and exquisite
True bypass
DC 9V Adapter power supply

MPN: SLOWENGINE
UPC: 6943206790921

• Input : 1/ 4"monaur al jack (impedance: 470k Ohms )
  
• Output : 1/ 4"monaural jack (impedance: 100 Ohms)
  
• Power Requirements: AC adapter 9V DC (centerminus plug)
  
• Current Draw:128 mA
  
• Dimensions: 93. 5mm (D) × 42mm (W) × 52mm (H)
  
• Weight: 170g
  
• Accessories: Owner's Manual