Feature: 1. Plastic Material: Made of high quality plastic material with high strength and low temperature resistance , durable, wear resistant, long service life. 2. Spring Cable: Come with DC to D‑TAP B port spring cable which can stretch to 90cm/35.4in, able to be effective to avoid winding, convenient for daily use. 3. Using Method: Can be connected to external mobile power supply, suitable for LED fill light, monitor, graph transmission and other equipment power supply. 4. Suitable Model: Applicable for Sony NP‑F550, NP‑F570, NP‑F970 cameras, no need to worry about the sudden power failure and reduce the problems during use. 5. Rich Package: There are a dummy battery, a D‑TAP B type port spring cable and DC bend spring cable included in the package, large quantity will be enough to meet your needs. Specification: Item Type: Dummy Battery Material: Plastic Color: As Picture Shown Application: For Sony NPs-F550, NP-F570, NP-F970 Weight: Approx.124g/4.4oz Input: 12V-24V Output: 7.4V/3A DC Port Size: Approx.5.5x2.1mm/0.2x0.1in (Positive Inside And Negative Outside). Package List: 1 x Dummy Battery1 x D-TAP B Type Port Spring Cable1 x DC Bend Spring Cable