ASUS VivoWatch SP (HC-A05)

High-reflective color LCD

Health Sensors:x2 ECG (electricalgraphy), x2 PPG (photoplethysmography)
Activity Sensors: gravity sensor, GPS, altimeter

Bluetooth 4.2 or Later (connect to android and iOS phone)

Android 4.4 or Later
iOS 11.0 or Later.

10 days (typical usage), and 14 days (power saving mode)

5 ATM

22mm (medical grade silicone)

36 g (without strap), 62 g (with short silicone strap)

Capacity: 200 mA, charging clip connected by USB

Wellness: (1) step (2) calories burned (3) sleep quality (sleep time, flips times, average heart rate, comfort sleep index)
Health management.: (1) heart rate (2) De-stress level (3) PTT index (4)Pulse O2 level (5)Body harmony
Activity & exercise: (1) Exercise and background heart rate (2) Exercising speed and distance