features:1. Double Cold Boot Opening Design:It Can Be Paired With A Fill Light/Microphone2. Stainless Steel Key Safety Latch:316 Stainless Steel Key,Anti Oxidation to Prevent Seawater Corrosion3. Multiple Collocation:New Cold Boot Opening DesignThe Waterproof Shell Cane Be Matched with More EquipmentUnderwater Connection Fill Light / Microphone Connection On Water4. Professional Waterproof 40m.5. Three Color Filters Take You Back To True Colors.6.Dual Hot Boots Support Link Dual Fill Lights.7.3pcs Color Filter :Red Filter Suitable for Using in Sea WaterThe Range of Use Is 5-20 MetersPink Filter Suitable for Sea Water SnorkelingThe Range of Use Is 5 MetersPurple Filter Suitable for Fresh WaterThe Range of Use Is 5-20 MetersNote:1. Due To The Light And Screen Difference, The Item's Color May Be Slightly Different From The Pictures.2. Please Allow Error Of A Few Centimeters Differences Due To Manual Measurement."