Beacon Lights are wearable red LEDs. These light weight red LEDs can be set to glow or flash modes with easy on/off. Beacon Lights are only compatible with Showers Pass items that have grommets integrated. To install, press the light into docking grommet. Beacon Lights come with a CR2031 battery. Lights are visible from 500 meters on flashing or continuous modes. Run-time is 120 hours on constant mode, 240 hours on flashing mode. Beacon Lights are programed to automatically turn off (after 30 min on continuous mode, or after 1 hour on flashing mode) to conserve battery life.