It is an automatic movement with a 28.800 beat rate and about 40 hours power reserve.Pressure tested to 100 ATM( equivalent to 1000m)Our first model, the Pantor Seahorse,it is a mechanical dive watch with a reliable Japanese Miyota 9015 movement. http://www.divewatcheshk.com/mens-dive-watches/ http://www.divewatcheshk.com/mens-dive-watches/pw01