42 mm diameter, 11.3 mm thick

*Product size, product weight, and related specifications are theoretical values only. Actual measurements between individual products may vary. All specifications are subject to the actual product.


1.4-inch full circle AMOLED display
400 x 400 screen resolution, 286 ppi
10,000:1 high contrast ratio


Bluetooth 4.1 BLE


6-Axis motion sensor (Gyroscope + Accelerometer)
Heart Rate Sensor (PPG)
Barometer, Vibration Motor


Cold-Forged 316 L Stainless Steel
Sapphire crystal

Operating System

Android 4.3+ / iOS 8.2+


512 MB RAM + 4 GB ROM*

*Due to limitations in CPU processing power, and memory used by the operating system and pre-installed applications, the actual space available to users will be less than the nominal memory capacity. Actual memory space will change along with application updates, user operations, and other related factors.


300 mAh*

*Typical value. Actual capacity may vary slightly.
 This capacity is the nominal battery capacity. The actual battery capacity for each individual product may be slightly above or below the nominal battery capacity.


Stainless Steel Case
Black-plated Stainless Steel Case
Rose gold-plated Stainless Steel Case

Straps (Standard 18 mm lug width)

Stainless steel Mesh Strap
Stainless steel Link bracelet
Genuine leather strap