Feature:1. STABLE AND PRACTICAL: Adopt good quality metal shell, possess stable and reliable performance, practical, easy to operate and use, long service life2. FOR RADIO STATIONS: Antenna tuner automatically tunes without any control wires, suitable for most radio stations3. 0.96IN DISPLAY WITH HOUSING: Mini shortwave automatic antenna tuner come with Type C charging port, 0.96in OLED display4. EXCELLENT CONFIGURATION: C channel capacitors adopt good quality 1000V high voltage SMD capacitors, and advanced PIC chips. UHF Connector5. CORROSION RESISTANT ALUMINUM ALLOY: Made of good quality aluminum material, light weight, possess good strength and good corrosion resistanceSpecification:Item Type: Antenna TunerMaterial: Aluminum alloyModel: ATU-100Display: 0.96in OLEDOperating Frequency: 1.8-55 MHzBattery Model: 3.6V lithium battery 1350MAHUSB Charging Current: 1AMaximum Operating Power: 100 wattsMaximum Possible Measured Power: 150 watts1 Watt: Necessary to start setting the minimum powerMinimum Possible Measured Power: 0.1 wattsMeasurement Steps With Power Up To 10W: 0.1WWhen Robust Measurement Steps STI Above 10 Watts: 1 wattPower Measurement Accuracy: 10%Specified Maximum Inductance: 8.53uH capacitanceMinimum Installation Step Size of Inductor: 0.05HMaximum Mounting Capacity: 1869 pF CapacitorMinimum Installation Step: 10.Package List:1 x Host1 x USB Cable1 x User ManualNote:1. Insufficient adjustment may occur within 5W. So don't try to go below 5W.2. It is recommended that the maximum power should not exceed 30 watts during tuning. (it can be set to 100 watts after tuning, and work at this power, otherwise it is easy to burn)3. You need to use 9‑12V to start the ATU‑100. If you use a power bank or computer USB port to output power, you cannot start the ATU‑100 because their voltage is too low.