Casio Men’s OmniSync Sports Gear Bluetooth Fitness Smartwatch – Link 
This has dropped by $20 to the lowest it’s ever been, at only $29.99!
Free returns.
- Smartphone links with iPhone 5s/5c/5/4s (with iOS7 or higher)
- Approximate 2-year battery life
- Features 1/100 second stopwatch, elapsed time, lap time, split time
- memory capacity: up to 120 records
- Water resistant to 330 feet (100 M): suitable for snorkeling, as well as swimming, but not diving