Knowledge Base

Find answers to frequently asked questions, easy-to-use guides to troubleshoot and perform basic functions like changing the combination or changing the battery, and more.

ESL Audit II Firmware Upgrade

  1. Log in with your user key
  2. Press 4 (USB)
  3. Press 3 (Firmware Update)
  4. Insert USB flash drive into USB connector located on the bottom of the controller
  5. Press “OK” on soft key
  6. Press “OK” again
  7.  Remove flash drive when complete