Seiko S057 - 100-Lap Memory Dual Timer for Interval Training

The Seiko S057 is a professional-grade dual-channel interval timer built for coaches who run structured, repeat-based workouts. With two independent countdown timers that can be preset up to 100 hours each and precision timing to 1/100 of a second, it keeps pace sets, rest intervals, and station rotations on schedule without a second stopwatch. A deep 100-lap memory means you can record an entire practice and recall splits later for performance review.

Key features & specs

• Two-channel countdown timer, each preset up to 100 hours
• Times up to 100 hours in 1/100-second resolution
• Split/lap measurement with two separate displays for split and lap time
• Stores and recalls up to 100 split/lap times; recall works during stopwatch operation
• Dot-matrix mode display with on/off confirmation sound
• Time and full automatic calendar, battery-life indicator, automatic shut-off
• Water resistant for outdoor use

Coach tip: Preset both channels for work and recovery to run continuous interval blocks hands-free. Wipe clean with a dry cloth, store indoors away from extreme heat, and check the battery indicator before meet day.