The controls have the following functions:
RES – Think of this control as to how big the room is that the echo is in.
CFR – A tone control.
LPF – Adds warmth to the effect.
PRD – Sets delay time.
MIX – Sets the amount of reverb.
DECAY – sets the length of the reverb.

Features:
1. with aluminum alloy casing
2. Power Requirement: 9V DC center negative
3. Current consumption: 50mA
4. Product Dimensions: 11.2×6.4×3.4cm
5. Weight:0.23kg