The new Galaxy S5 has an IP67 rating. But what the heck does that even mean? We walk you through Ingress Protection (IP) ratings here, but if you need a more hands-on explanation, the video above, from the folks at Tech Smartt, should be a good starting point.

To be precise, the Galaxy S5 is certified to resist water when submerged at depths of up to one meter for no longer than 30 minutes. So, why is the device in the video working after one hour at the bottom of the pool and another hour of tumbling in the washing machine? It’s because IP ratings are designed to reflect the baseline resistance of devices, the level of ingress protection that all non-defective units should have under normal circumstances.

Your phone may resist a dip in the diving pool, but anything beyond Samsung’s 30 minutes/1 meter rating is a risk you take, so you should probably play it safe. That’s the same advice we gave to users of the HTC One (M8), which can apparently take a dip, even if HTC doesn’t advertise water resistance as a feature.

For more on the Galaxy S5 and its durability, check out our fresh review.