Configure the interface Entering : long press the "TUNE" button, and turn on the power switch at the tail at the same time. After the interface displays "", release the "TUNE" button to enter the setting interface.Operation : short press the "TUNE" key to modify the current value. Long press the TUNE key to switch the setting items. of each option: Automatic mode (ON/OFF): Freely control the automatic mode of the antenna tuner, eliminating the need for the automatic button, which is more convenient to use. If the device is not going to be used, this value can be set to "ON" to enable automatic mode. The default value is "on".Loss display (ON/OFF): Control the loss calculation display interface arbitrarily, the display is more intuitive. When the input power is sufficient to measure SWR correctly, it indicates the power sent to the antenna and the efficiency of the receiver and transmitter.Fider Loss (0.0-9.9): The wire loss value can be freely defined, and the antenna efficiency can be calculated more accurately. This value is used to calculate the power sent to the antenna. The loss value can be found in the reference data of the cable used, or you can measure the exact value yourself.ATU Antenna Tuner Product Parameters:0.96 inch automatic day adjustmentDisplay: 0.96 inch OLEDKey Features of ATU-100 Pro+ 7x7 Antenna Auto Tuner:Operating frequency: 1.8-55 MHzBuilt-in 3.6V lithium battery 1350MAUSB charging current: 1ACurrent: 300maPower: 120WMeasurable power: 150W1W: Need to start setting minimum powerMinimum possible measurement power: 0.1WPower measurement steps 10W: 0.1WPower measurement steps above 10W: 1WPower measurement accuracy: 10%Specified inductance: 8.4 uH capacityInduc minimum installation step: 0.05HMounting Capacity: 1870 pF CapacitorMinimum installation steps: 10pfMaterial: Aluminum alloycolour: blackPackage Contents:1 x Antenna Tuner1 x USB cable1 x Chinese-English Instruction ManualOnly 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.