To your wrist can timing accurate, durable, we recommend：

The temperature：

Don't expose the watch to temperature changes () in sunlight and then soak in cold water immediately or extreme temperature [60 ℃ (140 ℉) or above 0 ℃ (below 32 ℉)]

The magnetic field：

Don't put the watch is exposed to strong magnetic field area, such as speakers, mobile phone, computer or refrigerators and other electromagnetic equipment around

Bump shot：

Strong impact would not only watch the damaged parts, and it may change the
running state machine core, should avoid to intense bombardment