Marsh MTS-1 (Tube Screamer) Pedal!!!This is a True Replica of the original Little Green Pedal loved by many Pros!!! Handwired using the same JRC4558 Dual Op amp used in the TS808. Operate with a 9 Volt battery, feed from your powered pedal board or a wall wart adapter (optional). These pedals typically take about two weeks to build.