Here's the WATER ECHO chorus + delay pedal from Donner, a leading Chinese effects pedal brand. I purchased this pedal used and have only used it a few times indoors. I'm selling it due to various circumstances. As the name suggests, it provides a smooth and flowing effect. Both the delay and chorus effects aren't overly harsh, producing pleasant sounds. You can set the delay time by tapping the footswitch (for both delay and chorus). I think it would be particularly good for acoustic-electric guitars. It doesn't run on batteries (though you might be able to use an external battery snap). Operation has been confirmed with an AC adapter. It's not very large, so it could be a surprisingly useful addition tucked away in a corner of your pedalboard. Thank you.