Product description: The dummy battery is detachable, NP-F battery plate and dummy battery can work separately. NP-F970 F550 F750 Battery Mount Plate: Input: 7.4V Output: 7.4V Material: ABS+Metal Compatible with NP-F970 F960 F750 F770 F550 F570 batteries. With an indicator light, red for low power condition. EN-EL14 Dummy Battery: Working voltage: 7V-9V Material: ABS Spring cable length: 35cm-110cm Size of DC Port: 5.5*2.1mm Decoding mode: full decoding Compatibility: DC coupler for Nikon cameras D5600/ D5500/ D5300 /D5200 /D5100/ D3300/ D3400 /D3200 /D3100 /P7800 /P7700 /P7100/ P7000 and more models. Package includes: 1 x EN-EL14 Dummy Battery 1 x F970 Battery Adapter Plate 1 x 1/4″ Screw