Adafruit-GEMMA-v 2-Miniature-Wearable-Electronic-Platform-Adafruit-1222-P-The-Adafruit-GEMMA-V2-Miniature-Wearable-Electronic-Platform-takes-small-wearable-microcontrollers-to-a-new-level-of-tiny-Measuring-just-28mm-across-the-board-features-a-micro-USB (Universal Serial Bus)-connector-for-power-&-programming-a-2-pin-JST-battery-connector-a-regulated-power-output-3-x-GPIO-pads-&-an-On-Off-switch-Based-around-the-super-small-ATtiny 85-with-8kbytes-of-Flash-512-bytes-of-RAM-&-512-bytes-of-EEPROM-running