The IPX standard gives you a clearer picture of how water resistant the item is, compared to vague marketing terms such as 'waterproof'.
So What rating of do waterproof radio use? which depend on your work environment？
If you work in general commercial places, supermarkets, hotels, retail stores, the waterproof level is generally not considered, IPX0 can be used.
If you are working on a construction site where there will be a small amount of water contact, IPX6 can be used
IPX7 available if working in kayaking, sea activities, etc.
IPX7 rating means that it should "survive" being dropped into water up to 1 metrwe deep provided it is taken out within 30 minutes.Retevis RT49P IP67 waterproof walkie talkie is suitable for waterproof activities.