[Great Material]With metal housing, stable and reliable performance, practical, easy to operate and use, has a long service life. [Antenna Tuner]The antenna tuner is automatically tuned without any control wires, suitable for most radio stations. [Effective]The device contains a set of 7 capacitors and 7 inductors, which allows it (with the largest configuration) to work effectively in a wide frequency band, overlapping the amateur radio HF band of 1.8-55MHz. [Perfectly Equipped]Mini shortwave automatic antenna tuner, Type-C charging interface, M seat, OLED display. Power supply voltage: USB charge and discharge (built-in battery) Maximum current consumption: 400mA Maximum working power: 100W Maximum possible measurement power: 150W Minimum power required to start tuning: 5W Minimum possible measurement power: 0.1W Measurement steps for power up to 10W: 0.1W Measurement steps with power higher than 10W: 1W Power measurement accuracy: 10% Maximum installation inductance: 8.54uH Minimum installation inductance step length: 0.05uH Maximum installation capacitance: 1870pF Minimum installation capacitance step length: 10pF Display: OLED Colour: black Material: metal Package Contents: 1 * Automatic Antenna Tuner Only the above package content, other products are not included. Note: Light 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.