For indoor use only. Tape is applied to the back. Operation confirmed. The following is a copy and paste from the official website. "tayutahi (i)" by minimichine. This is a collaboration product with Ishibashi Music Store staff. [Demo play available. Please see the URL below ↓] https://www.youtube.com/watch?v=0A04euNKI0k A simple tremolo pedal. The sound that sways retro-like and the LED that flashes in time with it are just like drifting through this world. Controls are DEPTH, which determines the depth of the sway, and SPEED, which determines the speed. In addition, it is equipped with three controls: VOLUME, which adjusts the effect volume, and it perfectly addresses the "feeling of the sound getting quieter" that is common with tremolo. Washi paper is used for the design, and wood is used for the knobs, so the design and color of each one are different. ・True bypass switch adopted ・From drilling the case to assembly and shipping, everything is done by one person. ・White LED is used. ・Powered by center-negative 9V or a 9V battery. ・The circuit board is point-to-point. ・An acrylic plate is placed on the surface to protect the design. ※ When using an adapter, be sure to use a center-negative DC9V adapter. ※ There may be unevenness, air bubbles, and dust in the paint. ※ The foot switch washer will be changed from the white plastic one in the photo to a metal washer.