1,Original Copper Terminal: This amplifier volume control board adopts original copper terminal, the multimeter pen can be directly inserted, the contact is excellent 2,Easy to Carry: This amplifier volume control board has high accuracy, small size, which is easy to carry and store 3,Good Practicability: This amplifier volume control board can adjust volume, treble, bass and volume balance 4, CCL Material: This power amplifier board is made of copper clad laminate material, which is durable and has long service life 5,Application: This preamplifier volume control board is widely used in home theater, audio, sound speakers, amplifier, etc. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.