Seiko Prospex Radio Sync Solar Chronograph. This sporty Men's timepiece is designed with a stainless steel case and bracelet. The black dial displays a date calendar with lumibrite hands and markers, measures up to 60 minutes in 1/5 second increments with a split time measurement function, 24-hour indicator. Radio-controlled, Radio Sync Solar Chronograph receives radio signals to adjust the time and calendar signal reception, result indicator. Powered by any light, its Solar Cell is energy-efficient with a 6-mth power reserve. 100M Water Resistant