I have bought, LED updated, and resold a number of SC21 Pro and SC21 Mini. I like that they are a complete package w built in charging.
Im on a mission to spread High CRI around the world… lol
I did a few SP10 Pro, but was disappointed that I cannot find the switch by feel, so I stopped buying more when my last one sold.
atm I have two SC21 Mini listed for sale here 
I only have that Green SC21 Pro atm, and was getting ready to offer it for adoption. The mods turned out great imo, I would be proud to pass it along.