Feature: 1. PREMIUM METAL SHELL: Antenna tuner adopts aluminum alloy shell, with stable and reliable performance, practical, easy to operate and use, not easy to damage, and long service life. 2. EASY TO USE: The antenna tuner is automatically tuned without any control line and is suitable for most radio stations. Shell does not need to be assembled, can be used directly. 3. COMPATIBILITY: Contains a set of 7 capacitors and 7 inductors, allowing (maximum configuration) to work effectively in a wide band, overlapping with the 1.8‑55MHz amateur radio HF band. 4. RECHARGEABLE AND DISPLAY DESIGN: Mini shortwave automatic antenna tuner with C type charging port, M mount, OLED display. Compact, lightweight and easy to carry, convenient to use at any time. 5. PERFORMANCE: 10% power measurement accuracy, 8.53μH maximum mounting inductance, 0.05μH minimum step mounting inductance, 1869pf maximum mounting capacity, 10pf minimum mounting capacity. Specification: Item Type: Automatic Antenna Tuner Material: Aluminum Alloy Maximum Working Power: 100W Maximum Possible Measured Power: 150W Minimum Starting Tuning Power: 5W Minimum Possible Measured Power: 0.1W Measurement Steps for Power Up to 10W: 0.1W Measurement Steps for Power Greater Than 10W: 1W Power Measurement Accuracy: 10% Specified Maximum Inductance: 8.53μH Minimum Mounting Step For Inductance: 0.05μH Maximum Installed Capacity: 1869 pF Minimum Installed Capacity: 10pF Built in Polymer Lithium Battery: 1350mAh. Package List: 1 x Automatic Antenna Tuner1 x Manual1 x USB Cable