Vortex crossfire 2 red dot. About 140.00 bucks.
Doesnt need the shake awake as you can just leave it on setting 6 _7 ( bright enough for the sunniest says ) all the time and the battery will last well over a year. 56000 hr battery life.
I and my son have had them. Both were left on 24 7 for well over a year with no dimming of the dot. I finally changed the battery in mine one day out of boredom.
I left mine on a rifle i sold without thinking. Wish i hsdnt .