Features 1、6 Levels of Sensitivity: The signal detector has 6 levels of sensitivity, allowing you to find the signal source accurately, perfect for home, office, travel, car, etc. 2、Microprocessor: The signal detector pen is embedded with a microprocessor, intelligent and accurate, with strong anti interference and far detection range. 3、LED Display: Signal detector is with 0.96 inch high definition LED display, long press the function key 1 and then turn on the power, you can switch between English and Chinese display. 4、Lightweight: The signal detector pen is convenient for keeping your individual privateness and information safe. Portable like a pen and easy to store. 5、Wide Application: Signal detector using passive wireless frequency sweeping, magnetic field detection mode, infrared combined method, suitable for finding eavesdroppers, telephone eavesdropping, conference eavesdropping, car eavesdropping, wireless cameras, wired cameras, etc. Specification Item Type: Signal Detector Material: Aluminum Alloy, PC Power Supply: Built In 3.7V 200mah Lithium Polymers Battery (Shipping With Built In Battery) Magnetic Field Detection Sensitivity: 7-35AT Detection Dynamic Range: 35dB-45dB Display: 0.96 Inch High Definition LED Display Long Press Function Key 1 And Then Turn On, Can Switch Between English And Chinese Display Receiving Frequency Range: 50MHz-3GHz Signal Detection Range: 5cm-5m Red Light Detection Distance: 10cm-10m This product uses passive wireless frequency sweeping, magnetic field detection mode, infrared light combined method, suitable for finding eavesdroppers, telephone eavesdropping, conference eavesdropping, tracking, car eavesdropping, wireless hole cameras, wired cameras, etc. Package List 1 x Detector 1 x Charging Cable 1 x Instruction Manual 1 x Infrared Filter