The tuner is housed in a stable mini metal housing (100x71x25mm) with front and rear panels acting as PCBs in the same way as the main printed circuit board. The front panel has a control button, two led indicators, a small 0.91-inch OLED 128*32 display and a USB Type C port for charging the tuner's built-in battery and connecting to a computer to change the firmware. The left LED indicates the battery charging process and the right LED indicates the operation. In operational mode, it flashes briefly every three seconds, depending on the battery charge level. Input power: Minimum 1W, Maximum 15W Power supply working voltage: 5V DC (type C) Maximum operating current: 12 mA Maximum operating power: 10 watts Maximum measurable power: 15 watts Minimum tuning power: 1 watts Minimum measurable power: 0.1 watts Power measurement step: 0.1 Watt Power measurement accuracy: 10% Maximum tuning inductance: 18.37 H Minimum tuning inductance: 0.1 H Maximum tuning capacitance: 4079 pF Minimum tuning capacitance: 22 pF Tuning frequency range: 1.8 ~ 30MHz (can be extended to: 1.8-50MHz or higher) Control protocol: Icom protocol Display screen: 0.91inch OLED 128x32 Charging voltage: 5V DC (Type C) Built-in battery: 2xLi-Ion 14500 (3.7V/ 850 mAh) RF interface: BNC Current consumption: 12 mA in active mode, 170 A in sleep mode, 37 A in shutdown state Colour:black Material:metal+plastic Package Contents: 1 x Antenna Tuner 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.