Description: If you are still worrying about the leakage of personal privacy in various situations, this product can easily solve your problems. This product is lightweight, portable, and highly efficient in detecting wireless signals, can help you to eliminate all problems of privacy leaks. specifications: Material: Plastic Color: Black Weight: 30g Product Size: Approx. 6 * 4 * 0.7cm / 2.3 * 1.5 * 0.3In Packing Size: Approx.12 * 8 *3cm / 4.7 * 3.3 * 1.1In Antenna Extendable: 16cm / 6.2In Detection Band: 100-2400Mhz Working Range: 1m / 393.7In Working Voltage: 1.5v Battery: 12V/23A Dry Battery (Battery Containing) Packing List: 1* Detector 1* User Manual Instructions: 1. First pull out the antenna 2. When the "A" button is pressed and the indicator light is on, move left and right. When the radio wave is received, the sound will sound and the indicator light will flicker. The long distance (depending on the transmission power) will lock the emission area. 3. Press the "B" key continuously to search for a short distance. When a radio wave is received, the sound sounds and the indicator flashes. 4. When the "B" button is continuously pressed for a short distance search, if the distance exceeds 2 meters, the antenna may have large power or interference, and the antenna may be appropriately shortened. Note: The product battery is 12 V/23 dry battery and it can be replaced. In order to replace the battery, unscrew two screws to open the back cover of the device. 【FUNCTION】: A professional signal detector, which can effectively detect the range of 100-400 (MHz) within 32.8 inches, 360 degrees without dead angle, protect your personal privacy. 【USE】: Button design, easy to operate, just pull up the antenna, press the A button to search for a long distance, and press the B button to search for a short distance, the detector is suitable for all kinds of people. 【APPLICATION】: Wide range of detection, strong practicability, suitable for hotels, restaurants, public toilets, dressing rooms, business negotiations, contract signing and places that may be snooping equipment. 【SIZE】: About 6 * 4 * 0.7cm / 2.3 * 1.5 * 0.3in, the wireless signal detector is light and portable, small and exquisite, comfortable and natural to hold in the hand, the antenna can be retracted, easy to carry. 【ACCURACY】: The antenna can be extended: 16cm/6.2in, the working range: 1m/393.7in, the working voltage: 1.5v, the signal detector responds quickly, is accurate and reliable, and supports long-term work.