Usage Tips:MAIN FUNCTION:The RF signal level meter can detect weak signals of microwave level, and can detect suspicious radio wave signals. BUFFER FUNCTION:This field strength meter has a built-in automatic shock absorption function, that is, a buffer function, which can prevent the needle from swinging too fast and causing damage. EXCELLENT PERFORMANCE:Our signal strength meter adopts advanced production technology and has excellent performance, which can be used for radio antenna radiation. STURDY AND :The antenna signal meter is made of high-quality materials, which is not only sturdy and , but also has a long service life. HIGH SENSITIVITY:This signal tester is mainly suitable for detecting radio waves of 20mhz‑6.5ghz, with extremely high sensitivity and adjustable. How to Use: Instructions for use: Please rotate the "Amplitude Adjustment" to the left end before use. The length of the antenna to be pulled depends on the test frequency. It is best to have as many quarter waves as possible. The handheld walkie‑talkie is about one meter away from strength meter. Don't get too close, so as not to burn strength meter if the signal is too strong. Then the PTT button of the walkie‑talkie to make the walkie‑talkie enter the mitting state. At this time, the pointer of strength meter should be signaled. The stronge the signal, the greater the indication. Amplitude adjustment: If strength indicator indicates that it exceeds the maximum range, you can adjust the "amplitude adjustment" to let the pointer indicate the appropriate position. Item Type: RF Signal Level Meter Use: for Radio Antenna Radiation Test Sensitivity 0.1W mitter Range: 0.1-1 Meters 2W/5W mitter Range: 1-3 Meters 10W mitter Range: 2-5 Meters 50W mitter Ra: 3-10 Meters Colour: as shown Material: ABS Package Contents: 1 * RF signal level meter 1 * Access