The dummy battery takes the place of the lp-e12 battery pack. it is the best choice for a long time photography for studio and indoor shooting. the power adapter continuously provides unlimited power to the camera through the ac outlet, no needs to replace the multiple batteries and the power supply charger, for you to complete long-term studio shooting, shooting video recording. Compatible with canon EOS M50 Mark II/ M50/ M200 / M100 / EOS 100D