This item is unassembled kit which buyer has to put all components on PCB board and do soldering. This item contains only PCB board and Components , no battery holder / battery in the package. Oftem in testing continuity or audio circuit fuction, where resistance measurement is not approriate, an audio signal can be injected and picked up by an amplifier or audio under test or by monitoring the output using the amplifier and earpiece. This kit has two fixed output tones 500Hz and 1kHz which are easily recognized against a background of other signals.
Trustpilot
3 weeks ago
2 days ago
