Phone requirements


iPhone running iOS 9.2 and above 


or


Android phone with Google Play running 7.0 Nougat and above


Bluetooth 4.0 capability required



Battery


Type: Rechargeable Lithium Polymer


Capacity: 400mAh


Battery life in use


  • Without backlight: 30 hours

  • With backlight: 10 hours

  • Blended: 20 hours

Battery life in standby: 4-6 months


Charging: USB-A charger with pogo pin interface



Display


  • Screen technology: Memory in Pixel transflective LCD with LED backlight

  • Resolution: 208 x 208, 287 PPI

  • Active area diameter: 26mm (1 inch)

  • Bonded toughened glass

Sensors


  • Accelerometer

  • Gyroscope

  • Magnetometer 

Connectivity


Bluetooth 4.0 low energy



Materials


  • ABS plastic

  • TPU

  • Silicone rubber

  • Toughened bonded glass

Interface


4 x physical buttons


Water and particle resistance


IP67 rated


Size and weight


49.8mm (1.96 inches) diameter, 18.6mm (0.73 inches) deep


30 grams (1 oz)