Offers protection from being completely submerged under at least 1 meter for at least 30 minutes. (This is where we’re getting into the more “real” waterproof subjects).
Offers different protection given by the manufacturer. This means that it’s better than the above but not to what degree. (This might be mentioned if it has been properly studied and tested by the manufacturer).
(anything under 7g per ear bud are considered light)
D: Intent to use True Wireless Earphone for calls and communications