This Coiled D-Tap to Sony NP-FZ100 Type Dummy Battery Cable from IndiPRO Tools allows you to power the Sony a7 III series cameras from any power source with a D-Tap input and an 11 to 19 V output. It features a built-in chip that delivers battery status to the camera indicator. The dummy battery end is compatible with the Sony Alpha a9, a7 III, and a7R III cameras.