6 Interval timers. 10 Run data storage. 3 Customizable alarms. EL backlight for full visibility in dark conditions. Dual time - view time in 12-hour or 24-hour format. 100-Hour chronograph and allows you to track total run time and see lap times. Night Mode - allows easier or automatic activation of light while running at night. Displays day date month and year. Sport ventilated wrist strap. Water resistant to 50 M. Case diameter: 46mm. Wrist strap size: 145-205mm.