Designed on the theory of wide range multiple band RF power detecting. Detects out all wireless pinhole cameras and mini wireless bugs within 10m, ensures your absolute privacy. Effectively prevents you from being shot by candid cameras or heard. Suitable for: Using in business negotiating and contract signing. Using for detecting whether there are pinhole camera in the restaurant, hotel, public latrine, swimming pool and dressing room. Using in devices or government office. Using in company, factory, cinema or art gallery. People who respects their personal privacy. Type: Wireless Signal Detector Detecting Frequency: 100 - 2400MHZ Effective Range: 10m/39.37inch (Approx.) Power: 23A 12V Battery (Replaceable) Functions: Works Precisely and Reliably, Small Size and Portable, Long Time Use Built-in Power Features: Useful, Portable, Easy to use, Radio Frequency Finder, Retractable Antenna Design Colour:As Shown Material:plastic Package Contents: 2 x RF Wireless Signal Detector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.