Features 1.TESTING ANALOG RADIO SIGNALS: Frequency counter can continuously test analog radio signals (handheld radios, cordless phones, GSM cell phones, etc.) and digital radio signals, displaying frequency parameters and signal strength. 2.STABLE PERFORMANCE: Frequency counter can realize automatic shutdown, single key control, one key with all functions. Equipped with foldable whip antenna, stable performance and high reliability. 3.SCOPE OF APPLICATION: Radio frequency counter is used for automobile radio frequency test, marine radio frequency test, hotel, community, property and other radio frequency test. 4.BUILT IN 9V 6F22 BATTERY: Portable frequency counter has a built in 9V 6F22 battery, when the battery needs to be replaced, remove the back cover and install the battery before use. 5.RADIO FREQUENCY MEASURING TOOL: Portable radio frequency counter is the first choice tool for maintenance personnel, wireless enthusiasts to test frequency and signal strength. specificationItem Type: Radio Frequency Counter_x000D_ Material: ABS_x000D_ Frequency Counting Resolution: 200K (Digital Signal Special), 1K, 100HZ, Optional_x000D_ Testing Distance: 450M About 8m / 26.2ft, 150M About 5m / 16.4ft_x000D_ Test Range: 50MHZ-2.4GHZ_x000D_ Battery Type: 9V 6F22 800mAh Alkaline Battery (Built In) PackageList1 x_x000D_ _x000D_ RadioFrequencyCounter 1 x Instruction Manual