Features: 1.USING BBD CIRCUIT: Classic flanging guitar effect pedal using BBD circuit to achieve excellent metal flanging sound, wave like chorus sound and fast trembling vibrato 2.MAINTAIN THE BEST SOUND QUALITY: Excellent tone electric guitar effect pedal and real bypass provide transparent tone, minimize tone loss, in order to maintain the best sound quality 3.WITH SMALL LED FLASH: Adopt classic paint finish, firm and stable, equipped with a small LED flash to indicate working status 4.EXCELLENT PERFORMANCE: Input impedance is 500K, output impedance is 10K, this effect pedal come with excellent performance 5.GOOD METAL MATERIAL: Guitar effect pedal use excellent metal material, easy to conduct electricity, shiny, sturdy and durable specification:Item Type: Guitar Effect Pedal Color: White Material: Metal Input Impedance: 500K Output Impedance: 10K Delay Time: 0.9ms~6.4ms Effect Change Rate: 0.4Hz~8Hz Working Current: 20mA Product Power Supply Mode: 1 x 9V battery 6F22(not included) or 9V DC power adapter(not included) PackageList: 1 x Guitar Effect Pedal 1 x User Manual