General
If you're in the market for a good external effects processor, then the TC Electronic M100 with 16 high-quality (multi-)effects is the device you're after! Highly versatile and easy to use, this all-in-one effects bank provide two inputs, so you can send either a mono or stereo signal. Connect it to your mixer or use it as an effects unit for your keyboard. With a foot switch (not included), you can easily switch it on or off. Furthermore, you can adjust the incoming and outgoing signals as well as the mix; from the dry incoming signal to the wet effects signal and everything in between. There are controls to select and tweak the effect, as well as time-based effects and tap tempo.