Non-Collapsible Baton

The NLJD emits a high‑frequency RF probing signal (often around 2.4 GHz, or other bands) into the area being inspected.

If the RF signal interacts with a semiconductor junction (for example a diode or transistor inside hidden electronics), that junction generates harmonic frequencies (‑ the 2nd, 3rd harmonic) due to its nonlinear response.

The detector’s receiver captures these harmonics, and the device then indicates a “hit” — often via visual (bar‑graph), audio or tactile cues — signalling the presence of suspicious electronics even if hidden behind walls or inactive