Unique Design: Vacuum Pump System can completely remove the air from the camera's waterproof case O-Ring: There are two O-rings inside the waterproof shell. The O-ring can make the shell more sealed, so as to achieve better waterproofness(Apply grease to the O-ring and make sure the O-ring and the groove of the waterproof shell are clean before use) Preparation Before Entering The Water: 1. Before installing the waterproof shell on the camera for underwater shooting, first put it in water with a depth of about 1M to ensure that there is no water leakage 2. Repeatedly operate the buttons and dial of the waterproof camera case to ensure that the camera's internal functions are all normal 3. Make sure the safety lock is locked How to Clean: 1. Rinse the outside with tap water, then wipe the water with a soft cloth; 2. Wipe the inside of the diving shell with a dry soft cloth. Do not use water and other solvents to clean the inside of the waterproof housing(It is recommended to take out from the sea water Then fasten the waterproof shell and soak it in fresh water for 30 minutes.) Packing Included: 1 x Underwater housing 1 x Wrist strap 1 x Shoulder strap 1 x Spare O'ring 1 x Dust-free cloth 1 x Shade cover 1 x User manual Note: 1. Do not use the waterproof shell in water with a water temperature below 0° and above 40° or a depth of more than 60M 2. Avoid placing the waterproof case in a hot, cold and humid place 3. When storing, keep the waterproof shell open, which can prevent the O-ring of the waterproof shell from being deformed, so ensure that it remains waterproof; When not using for