Compact Digital DMM Acmv W/Boot Test Leads And Manual. Safety: Meets CE and IEC 1010 requirements. UL Listed. Large LCD: Easy to read at all angles and the majority of lighting levels. Data Hold: Freeze readings on the display. Rubber Boot: Added protection when the instrument is dropped. (122NB does not include boot.) Versatile: Use accessories like a carbon monoxide attachment to expand the capabilities of the 122.