Oppo Watch Faq page 13

10.6.8 What is a Fat burn run? ............................................................... 81
10.6.9 How is the fat-burning heart rate zone calculated? ............ 81
10.6.10 Do I have to keep my heart rate within the fat-burning
zone in order to burn fat? ............................................................................. 82
11 Device Info and Warranty ........................................................... 83
11.1 How to look up DC code / IMEI？ ....................................................... 83
11.2 What is the warranty policy of the watch? ................................... 83
11.3 What is regulatory information? ...................................................... 83
12 Hardware ........................................................................................ 84
12.1 Is OPPO Watch waterproof？ ............................................................. 84
12.2 Can I go in the shower with it? ......................................................... 84
12.3 Is the watch hypoallergenic? ............................................................ 84
12.4 Can I wear it if I have a nickel allergy? ........................................... 85
12.5 Who shouldn't use it? .......................................................................... 85
12.6 What is the screen made of? ............................................................. 85
12.7 How to keep watch and straps clean? ........................................... 85
12.8 What does 3D screen glass mean? ................................................. 86
12.9 What is the wristband made of? ...................................................... 86
12.10 Are there vegan-leather straps available? ................................. 87
12.11 How much does it weigh? ............................................................... 87
12.12 Are the straps interchangeable? .................................................. 87
12.13 What is the screen size? ................................................................. 87