Description: This assembled ATU-100-0A is an automatic tuning antenna. When installing and using it, please try to use a short coaxial cable to connect the short-wave machine to the in end of the antenna; use the out port to connect your antenna. When it 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-100-0A, 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. The finished board comes with a 128*64 OLED display screen, which takes into account power saving and display font coordination; please pay attention to the consistency of the data cable (dat clk) when installing the screen. 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 0.05h - Maximum load inductance value: 8.53h - Minimum load capacitance: 10pf - Maximum load capacitance value: 1869pf Package Included: - 1 x Set of Automatic Antenna Tuner Note: - Its software version is v3.1. - With built-in lithium battery for usb 5v charging. - It is assembled and ready to use.