Feature: 1. STABLE AND PRACTICAL: Adopt good quality metal shell, possess stable and reliable performance, practical, easy to operate and use, long service life 2. FOR RADIO STATIONS: Antenna tuner automatically tunes without any control wires, suitable for most radio stations 3. 0.96IN DISPLAY WITH HOUSING: Mini shortwave automatic antenna tuner come with Type C charging port, 0.96in OLED display 4. EXCELLENT CONFIGURATION: C channel capacitors adopt good quality 1000V high voltage SMD capacitors, and advanced PIC chips. UHF Connector 5. CORROSION RESISTANT ALUMINUM ALLOY: Made of good quality aluminum material, light weight, possess good strength and good corrosion resistance Specification: Item Type: Antenna Tuner Material: Aluminum alloy Model: ATU-100 Display: 0.96in OLED Operating Frequency: 1.8-55 MHz Battery Model: 3.6V lithium battery 1350MAH USB Charging Current: 1A Maximum Operating Power: 100 watts Maximum Possible Measured Power: 150 watts 1 Watt: Necessary to start setting the minimum power Minimum Possible Measured Power: 0.1 watts Measurement Steps With Power Up To 10W: 0.1W When Robust Measurement Steps STI Above 10 Watts: 1 watt Power Measurement Accuracy: 10% Specified Maximum Inductance: 8.53uH capacitance Minimum Installation Step Size of Inductor: 0.05μH Maximum Mounting Capacity: 1869 pF Capacitor Minimum Installation Step: 10. Package List: 1 x Host1 x USB Cable1 x User Manual Note: 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.