Compatible Models: This flash battery door cover is specifically designed for the YN600EX RT II, YN685, and YN660 models. Ensure you check your camera model before installation to guarantee a seamless fit and optimal performance. Seamless Fit: Engineered with precision in shape and size, this battery compartment cover offers a perfect fit. Once correctly installed, it ensures smooth operation, keeping your flash functioning at its best without any hassle or adjustment issues. Easy Installation: Featuring a minimalist design, this battery door cover is incredibly easy to assemble and remove. Its straightforward operation makes it simple to use, store, and carry, allowing for quick replacements and minimal downtime during your photography sessions. Premium Material: Crafted from high-quality ABS material, this cover is both sturdy and dependable. It provides excellent stability, helping to extend the lifespan of your flash by ensuring the batteries are well-protected whether in use or during transport. Ideal Replacement: Although not an original product, this flash battery door cover serves as an excellent alternative or backup. It delivers the same functionality as the original, ensuring your flash remains fully operational and ready for use whenever you need it. Perfect for photographers who need a reliable and cost-effective solution to keep their equipment in top condition.