This assembled antenna tuner ATU-100 is an automatic tuning antenna. When the ATU-100 detects that the tuned transmit power is reached and the standing wave value is greater than 1.3, the tuning can be started, and after the tuning is completed (within the ability of ATU-100, if your antenna is not well matched, it will not be able to be reduced below 1.3, please adjust the antenna), you can perform high-power communication test. Technical Parameter: Allowable supply voltage range: 10-15V DC Maximum current consumption: 400mA Maximum working power: 100W Maximum measurable power: 150W Start to input tuning power: 5W (10W or more is recommended, and the maximum should not exceed 30W) Minimum measurable power: 0.1W Power measurement accuracy: 10% Minimum load inductance value 0.05μh Maximum load inductance value: 8.53μh Minimum load capacitance: 10pf Maximum load capacitance value: 1869pf Other detailed technical parameters and schematic diagrams, documents, pcb source files and firmware can be downloaded from the following site: https://github.com/Dfinitski/N7DDC-ATU-100-mini-and-extended-boards/tree/master/ATU_100_EXT_board Colour: red Material: PCB board + plastic + metal Package Contents: 1 x Antenna Tuner 1 x cable (random cable color, don't accept the specified color) 1 x OLED screen Note: The product is assembled. The firmware version has been upgraded to 3.2. Only the above package content, other products are not included. Note: Light shooting 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.