ULTRASPORT GPS PULSUHR NAVRUN 500

Options
Have just bought one of these as an upgrade to my HRM - it says it's waterproof to 30m BUT in the actual instructions it's not clear if that is just the watch part or the chest strap as well. I want to use this for triathlons so need both parts to be waterproof. All the online help is in German, the Amazon listing isn't clear either. Has anyone any experience of this product?