Proxxi is a hardware and software company for industrial settings that has developed a wearable wristband to protect workers from electricity. Proxxi has repurposed its core product into a COVID-19 workplace distance and contact-tracing wristband (entitled the Halo system, or Halo). Halo vibrates to notify wearers that another band is within six feet (two metres), gently reminding workers of the need to maintain social distance.