... Test Standard 3 well function underwater Description:1.to a depth of 12 meters2.high qulity &low ... mobile phone 2. good tightness, high mechanical strength, to protect your mobile phone 3. dustproof, anti-staining ... of fresh water (running water or drinking water) to thoroughly clean the outside of the case .. ... water, include Safety lock device.4,In order to Avoid Scratch equipment by sand and dirt, ...