The O clock it is extremely hardwearing and easy to clean. There are thousands of different combinations for you to personalise your watch with and you can choose quickly and easily from the huge array of straps and dials. Composing your O clock is really easy and fun. If you need help, you can consult our assembly handbook which is available online. O clock can withstand a maximum pressure of 3 ATM but is not waterproof. The dial already includes the SR626SW battery. The image is merely indicative. The item may undergo variations during the production process. The photograph shows the colours of the item as accurately as possible; nevertheless, colours may not appear the same on different screens. We cannot guarantee that the screen of the device used will accurately reproduce the colour.