The DOTZ2 / Gluvmax chips are for DOTZ2 and Gluvmax housings! Each chip uses two CR1616 batteries. These are great for using inside DOTZ2 Housings without OrbitAdapter for orbiting. It allows you to easily change the LED bulbs. Simply purchase any of our LED bulbs (e.g. strobes, dashes, ribbons, dops, etc.) and they can be used with these chips.