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