Tissot Supersport Chrono T1256171105100. 316L stainless steel case. Swiss quartz. Battery type Renata 394. 30-minutes and 1/10 of a second counters, ADD and SPLIT functions, central 60-seconds chronograph hand, EOL (battery end-of-life indicator). Interchangeable quick release bracelet, folding clasp with safety and diver extension.