With Volume, Bass, Middle, Treble, Presence control knobs LCD Tuner system, digital Procedding tuner system Fine workmanship and perfect style. Easy to install and durable in use. High Wear-resistant and excellent durability. 100% Band new and high quality. Power supply mode: 6F22 9V battery power supply (not included) Phase Reverse Switch Automatic low Battery check LED Mode: 4 band and EQ with tuner Material: ABS+metal Color: Black Package Contents: 1 x Guitar Equalizer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.