The GlowSaver is just as the name implies. This protective case will keep your Garmin Alpha 100 clean while keeping dirt/grime out of the buttons. Introduction to any light source will charge the glow in the dark material. Features a dirt resistant coating to help with the continuous use of dirty hands or gloves. Besides the high quality case provided we also include 2 screen protectors for your Alpha. These cases can be used in conjunction with the dash mount that is sold separately. Keep your Alpha clean and protected with the peace of mind of having a glow in the dark case. This is cheap insurance to help find your most used equipment in the woods while hunting.