Features:With backlight function, you can use this digital signalfinder at night.Elegant exterior and convenient to carry.Great for remote satellite antennas.This is a great professional digital TV signal finder with excellent sensitivity.Create a digital TV Era for you to enjoy a happy life.Specifications:Frequency Range: 170 ~ 862MHzInput level Range: -40 ~ -10dBmInput Level Range: 65 ~ 95 dBuvPower Supply: 9V DC or battery pack 6 x AA Battery (Not include)Dimension: 100 * 35 * 65mm / 3.94 * 1.38 * 2.56inchPackage Weight: 194gOperation:1. Connect the antenna cable to the left F Female and the battery pack cable to the right F Female. Remove any external amplifier* that may be connected to the antenna.2. Adjust the antenna to the best position by watching the meter's reading. Higher up the scale gives a better signal. If the finder's reading becomes full scale, adjust the level control knob to reduce the reading to around 5 (Turning the knob clockwise will decrease the reading), continue to move the antenna until you have the highest possible meter reading.3. Remove the finder and replace any amplifier that was disconnected.Package List:1 x Signal Finder1 x Power Cable1 x AA Battery Box (Batteries are not included)1 x User Manual.