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 the field strength meter. Don't get too close, so as not to burn the field strength meter if the signal is too strong. Then press the PTT button of the walkie?talkie to make the walkie?talkie enter the transmitting state. At this time, the pointer of the field strength meter should be signaled. The stronge the signal, the greater the indication.
Amplitude adjustment:
If the field strength indicator indicates that it exceeds the maximum range, you can adjust the "amplitude adjustment" to let the pointer indicate the appropriate position.

Specification:
Item Type: RF Signal Level Meter
Material: ABS
Use: for Radio Antenna Radiation
Test Sensitivity:
0.1W Transmitter Range: 0.1-1 Meters
2W/5W Transmitter Range: 1-3 Meters
10W Transmitter Range: 2-5 Meters
50W Transmitter Range: 3-10 Meters

Package List:
1 x RF Signal Level Meter
1 x Antenna