1.Onekey frequency measurement, wireless reception, fast decoding, and automatic detection. 2.After the frequency measurement is completed, the frequency counter and the walkietalkie can that the frequency is accurate. 3.Frequency meter can test frequency, subtone, frequency hopping, encrypted frequency point. 4.The frequency meter can communicate with the walkietalkie by pressing the PTT button to detect the accuracy. 5.The frequency meter can measure the frequency of the walkietalkie and is very useful. Item Type:Walkie Talkies Frequency Meter Built-in Lithium Battery:500 mAh Language Voice:Chinese and English voice Interface Display:Switch between Chinese and English How to use: 1.Turn on the walkie-talkie. Press and hold the power button for 3 seconds to turn on the frequency meter 2.Press the frequency measurement button on the frequency detector and wait for the data to be received 3.Press and hold the transmitter button on the walkie-talkie for 3 seconds, and the frequency tester will receive the data and display the video as complete. 4.The frequency tester can communicate with the walkie-talkie by pressing the PTT button to detect the accuracy of the frequency and sub-tone Colour:Black Material:plastic Size:.7.5x6x2cm/3.0x2.4x0.8in Package Contents: 1 x Walkie Talkies Frequency Meter 1 x USB Charging Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.