Coga Sound produces Glo-Pots. Winglets and the BPS Battery Power System. COGA Sound GLO-POTS are replacement glow-in-the-dark faders for Sound Devices and Zaxcom recorders. Coga Sound Winglets for Zaxcom Nova are lightweight attachment brackets allowing the Nova to be used with any existing sound bag. The latest product from Coga is the BPS. This Battery Power System is a adapter / power distribution made for sound bags.