Features: Presented as having excellent sensitivity and precision, they help you find the best position for DVB-T antenna installation. Equipped with a compass for easier and faster adjustment. With ringtone control and attenuation function, simple and user-friendly operation. The numbers in the feedback indicate the signal strength intuitively. Mini size and light weight, truly portable and easy to carry. Operation: 1. Connect the antenna cable on the left to the F-female and the battery pack cable on the right to the F-female. Remove any external amplifiers * that may be connected to the antenna. 2. Adjust the antenna to the best position by looking at the indicator reading. Higher on the scale gives a better signal. If the finder's reading is full scale, adjust the level control knob to reduce the reading to around 5 (turn the knob clockwise to reduce the reading), continue to move the antenna until the highest possible reading is obtained. 3. Remove the finder and replace any disconnected amplifiers. Important note: - If your antenna has an internal amplifier (e.g.: 01MM-SQ01) it must be powered by an external power source via a DC insertion module. Make sure the electrical insert is placed between the finder and the antenna. Features: Color blue Material: plastic Frequency range: 170-860MHz Input level range: 65-95dBuv Impedance: 75Ω Insertion loss: ≤5.0dB Power supply: 9-12V DC Item size: Approx. 127 * 63 * 35mm / 5 * 2.48 * 1.38in Item weight: Approx. 90g / 3.2oz Package size: approx. 18.6 * 14.1 * 4.3cm / 7.32 * 5.55 * 1.69inch Package weight: Approx. 197g / 6.97oz