Tremolo effect, with a switch used to select the waveform of the tremolo (hard or soft), lavitesse and depth of the wave are adjustable.
The case is plastic, so it must be handled gently with your foot.
Power => 9 volt battery or power supply.

UTILIZATION

The configuration is extremely easy to use because it is quite dlicat to find the right speed for the effect, if you want notament a rather slow tremolo that locks onto a pace prcis.
Even access to the battery is quite dlicat must dvisser intermdiaire the trap by a kind of plastic screws ... Not great but good.
However once we have the right speed, it remains to choose the form of the wave (hard or soft) and depth (depth adjustment means that only soft mode), and we interressants sounds very quickly.

SOUND QUALITY

I think it's the highlight of the tremolo, the Hard mode gives an effect that sounds superbly hach ​​ds at that speed is calle.
The method gives a soft cot retro also very interresting.
In short it sounds great with all guitars and amps all.

OVERALL OPINION

I use the pedals recently, and I am fully satisfied. Apart from the speed control, and finish that would have AIM stronger, the Tuna Melt is a gnial tremolo that sounds extremely good.
It is also one (if not THE) of the cheapest on the market then report qualitprix very very good.