Ethan L.
While I like the EMR10's LED screen, over time I find the need to remove its batteries for charging a major chore. EMR20 is more compact than its predecessor. Charging it is much easier and a full charge lasts me 7 hours, perfect for a good night sleep. Switching it on however, I bet you can never figure it out without reading the manual. And if you don't use the device often, best to keep the manual handy.






































