I bought a ModRetro CHROMATIC from GameStop and it wouldn't turn on, luckily they replaced it! This device is a must pick up if you're a GameBoy (GB) or GameBoyColor (GBC) enthusiast/collector!
Rubber feet mentioned - https://www.amazon.com/gp/product/B074C2XKXH/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1