Specifications

  • Dimensions: 37.5 x 40 x 11mm

  • Weight: 38 grams

  • IP Rating: IP67 (waterproof to 1 meter (sealed edition))

  • Display:

    • Size: 1.3 inches (33mm) diagonal

    • Type: IPS capacitive touchscreen, RGB 65K colors

    • Display Controller: ST7789

    • Resolution: 240x240 pixels

  • System on Chip: Nordic Semiconductor nRF52832

  • Flash: 512KB with additional 4MB SPI NOR

  • RAM: 64KB

  • Bluetooth: 5.0 (including Bluetooth Low Energy)

  • Sensors: Accelerometer, Heart rate sensor

  • Feedback: Vibration motor

  • Battery: 170-180mAh 3.8V LiPo