his is the last 16mm camera produced by Minolta, Kodak has released the 110 film size...Simplified version of the MG-S, it is only semi-automatic, with only two speeds. 3 elements lens. In the window, two diodes "O" and "K" lit, one for too much light, the other if there is not enough. If the light is good, it shows "OK".Power source: one PX30 battery (3v)or two LR53, no longer manufactured, I could replace it with a small 3V lithium (CR2330) and some washers. But like all cameras purchased in the same lot, it's electronics is burned.