Reverb pedals can be very expensive. This is one of the best value reverb (not just slap back delay) pedals on the market. It provides a range of excellent useable reverb tones.  Comes in a durable metal enclosure and is Buffer Bypass design.
 
The controls have the following functions:
RES - Think of this control as 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 reverb.
 
Features:
1.Buffer Bypass design, with aluminum alloy casing
2. Power Requirement: 9V DC center negative
3. Current consumption: 50mA
4. Product Dimensions: 11.2x6.4x3.4cm
5. Weight:0.23kg