1、NP‑F550 dummy battery is used to to replace the real batteries to extend camera shooting and battery life. 2、The extended cable gets rid of the limitation of the space, which is very suitable for various indoor shooting for a long time. 3、Using high‑quality plastic, the external power supply can effectively reduce the heat of the camera. 4、Multiple protection fuctions, such as short circuit protection, overvoltage protection and overcurrent protection, ensuring the safety during use. 5、Plug and play, it is very convenient to use. It has high conversion efficiency and good stability. Item Type: AC Power Adapter DC Coupler Dummy Battery Kit Material: Plastic Product Color: As Pictures Shown DC Port Size: Approx. 5.5x2.1mm / 0.2x0.1in (positive inside and negative outside) Product Weight: Approx. 260g / 9.2oz Decoded: Full Decoded Dummy Battery Model: NP‑F550 Output Current: 3A Applicable Models: Power supply for LED fill light, monitor, camera, wireless image transmission using NP-F550 series batteries , etc. 1 x Dummy Battery 1 x AC Power Adapter 1 x Plug