KJB Security SK199 Auto RF Pen Detector with UV Light. Detects wireless RF and UV devices. Light will blink based on proximity to detected device. Approxmiately 4 weeks of battery life (depending on use).
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- Detects wireless RF and UV devices
- Light will blink based on proximity to detected device
- Approxmiately 4 weeks of battery life (depending on use)
- Automatic RF detection
- Built-In anti mobile phone interference
- Frequency range 100MHz to 3GHz
- Currency checker
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This versatile ink pen is a RF and UV Detection Device. The pen automatically detects wireless signals and alerts you with a red flashing light at the tip of the pen, flashing more frequently as the signal becomes stronger.
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I would recommend this to anybody the ages of 9-12.
When I got the pen, and changed the batteries i expected it to blink ... but there was nothing , i tried and i tried until actually it started blinking as the earlier review said "it literally has to be on the top of the mobile/camera to blink" and thats exactly what happened to me ... i intended to catch people cheating in my class with hidden mobile phones/camera/headphones, but i guess i can't now... its a waste of money