Normally around $ 180. 40mm is $ 159.96. 20% off normal price until 5/31. This is one of the most well reviewed hybrid smartwatches around.

Track heart rate during workouts to optimize training, and monitor daily and resting heart rate to improve health over time
Automatically track walk, run, swim, sleep, distance & calories burned
Up to 25 days battery, plus 20 more days on power reserve mode
Get a report of sleep cycles, sleep duration & wake-ups plus set a silent vibrating alarm using Smart Wake-Up™