1. Ready-to-Use Convenience: This automatic antenna tuner comes fully assembled, allowing you to use it right out of . With no assembly required, you can immediately enjoy the benefits of this tuner developed by N7DDC. 2. Premium Components: Equipped with high-quality mount capacitors, C-channel capacitors, premium 1000V high-voltage mount capacitors, and PIC chips, this antenna tuner ensures top- performance and reliability. The ultra-high frequency connectors further enhance the overall quality. 3. Extremely Compact Design: The machine's exterior shell is meticulously crafted by a talented designer, resulting in a compact and exquisite form. With its sleek and space-saving design, this mini automatic antenna tuner is perfect for those seeking a portable and visually appealing solution. 4. Dual Tuning Modes: This automatic antenna tuner offers two tuning modes: automatic and manual. The automatic mode allows for effortless tuning, while the manual mode provides more control and customization options. Choose the mode that suits your preferences and operating style. 5. Note: 1. Under-tuning may occur within 1.5W. So don't try to go below 5W. 2. It is recommended that the maximum power does not exceed 30 during tuning.(After tuning, you can set 100 and work at this power, otherwise it is easy to burn) Instructions: 1. Connect radio - ATU antenna tuner - antenna 2. When using for the first time, please set the output power of the radio or power amplifier between 20-30W, warning: high power tuning may easily damage the antenna tuner! 3. Set the radio mode and use FM mode 4. Select the antenna band to be used, use 20-30W power in FM mode, the radio PPT, and observe the ATU antenna tuner PWR and SWR 5. Use of the ATU button TUNE: short (less than 1 second) the ATU button is in the reset state, long (more than 1 second) the ATU button is in the adjustment state. Maximum current: 450mA Maximum operating power: 100 Minimum power for tuning start: 1 watt Minimum measured power: 0.1 watt Power measurement step below 10 : 0.1 watt Power measurement step above 10 : 1 watt Power measurement accuracy: 10% Maximum inductance setting: 8.5 uH Minimum step for setting inductance: 0.1 uH Maximum installed capacity: 1870 pF Set the minimum capacitance step: 10 pF Product size:135.00x98.00x38.00mm/5.31x3.86x1.5inch Color:Black Material:Aluminium Package Contents: 1 * antenna tuner 1 * charging cable 1 * English manual 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.