Alcatel Onetouch go watch SM-03 Manual Del Usuario página 10

Resistance to solid objects such as dust
US
0: No special protection
1: Protected against solid objects larger than 50mm in
diameter
2: Protected against solid objects larger than 12mm in
diameter
3: Protected against solid objects larger than 2.5mm in
diameter
4: Protected against solid objects larger than 1mm in
diameter
5: Protected against dust; limited ingress (no harmful deposit)
6: Totally protected against dust
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