Designed for safety and compliance Verify your test tool without unnecessary exposure to shock and arc flash Additionally the PRV240FS also provides ac and dc voltages for other HiZ instruments in your tool box A single switch and a set of LEDs indicate functionality of both the FieldSense “no-test-lead” voltage measurement capability plus standard ac and dc measurements with test leads. This unit is a simple-to-use solution for complying with TBT verification of your test tools