Knowledge of protection level: IPXX
Dust-proof grade (the first X indicates)
0: No Protection
1: Prevent large solid intrusions
2: Keep medium-sized solids out
3: Keep small solids out
4: Keep solids larger than 1 mm from entering
5: Prevent harmful dust build-up
6: Completely prevent dust from entering
Waterproof Grade (the second X indicates)
0: No Protection
1: Water drops drop to the shell without effect
2: When the Shell is tilted to 15 degrees, water droplets drop into the shell without effect
3: Water or rain from a 60-degree angle to the Shell has no effect
4: The liquid is splashed into the casing from any direction without harm
5: Rinse with water and do no harm
6: Can be used in the cabin environment
7: Water Resistance (1m) within a short time
8: Soak under pressure for a long time