ANTENNA TUNER: Miniature shortwave automatic antenna tuner, without any control line operation, suitable for most radio stations. EXCELLENT PARTS: Adopts C channel 1000V high voltage SMD capacitor, advanced PIC chip and UHF connector to ensure stable performance. GOOD PERFORMANCE: Higher level capacitance, larger magnetic ring, thicker wire diameter, greater power bearing capacity, total inductance 12.4uh. ALUMINUM ALLOY: The shell of the antenna tuner is made of aluminum alloy, with light weight, fast heat dissipation and corrosion resistance. COMPACT SIZE: The automatic antenna tuner has compact structure, convenient connection, portable design is suitable for home or vehicle use. Item Type: Automatic Antenna Tuner Power Supply Voltage Range: 10-15VDC (+in the center) Maximum Current Consumption: 500mA Maximum Working Power: 150W Starting Tuning Minimum Power: 5W Minimum Measurable Power: 0.1W Measurement Accuracy Up to 10W Power: 0.1W Measurement Accuracy Greater Than 10W Power: 1W Maximum Installed Inductance: 8.53H Minimum Installation Inductancee: 0.05H Has the function of power meter standing wave meter (according to BYPASS, straight through mode, one horizontal line in the middle of the screen, the test value is approximate, and the accuracy is lower than that of professional high accuracy meter, for reference). PIC18F2520, MCU (faster). The maximum measurable value is SSB 275w. It is recommended that the SSB should not exceed 200w for a long time. For other continuous modes, the power shall not be greater than 100W (FT8, CW, FM, when the standing wave deviation is large before adjustment, the power shall be reduced as appropriate, and it is recommended to use 10min interval for 5min). 1.8-50MHz (specifically affected by antenna length and standing wave deviation). Tuning Impedance Range: 5-1.2K Colour:As Shown Material:Aluminum Alloy Package Contents: 1 x Antenna Tuner 1 x Cable(Due to different product batches, the appearance may vary, which does not affect the use) 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.