This is an older type, so it doesn't have an LED. It also runs only on battery power. Washers have been used to prevent the input and output jacks from protruding. The deteriorated sponge has been removed. I didn't mind it, but there is some slight crackling. Please refrain from returns to prevent swapping, etc. The Maxon D&S II effector allows you to adjust DISTORTION, TONE, and BALANCE, allowing for a wide variety of changes to your guitar sound. - Brand: Maxon - Model Name: D&S II - Controls: DISTORTION, TONE, BALANCE - Connections: amplifier input - Country of Manufacture: Japan Thank you for viewing.