About this device:

Mobile Phone Signal Detector  800-1000MHz 1800-2000mHz up tp 40 meters

Product descriptions
This cell phone detector JYT-D007A is compact and lightweight and comes with a plastic case and a detachable antenna
Compared with JYT-D007A model, JYT-D007A can detect cell phone signals more effectively within a frequency range of 800-1000MHz to 1800-2200MHz
It’s easy to operate with just a simple on/off button
When sweeping your room or other locations, if a cell phone signal is found it will alert you by sending out a sound
You can easily see the radiation intensity on the front via 9 grades of LED light indicators
This model is suitable for hospitals, airports, industrial plants and laboratories.

Specifications:
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Package contents