Features:LED display to show the data clearly.Measuring Frequency Range: 1Hz~50MHz; Signal Frequency: Max.30V.Can measure the oscillation frequency of most commonly used crystals.Automatic range conversion without manual switching.Programmable addition and subtraction frequency settings, can measure radio transceiver.Includes five precision resolutions and power saving mode.The display will be turn off automatically if there is no obvious change within 15s.With transparent case, components can be well protected.Wide Power Supply, can be powered by USB/external power(5~12V)/9V battery.Specifications:Material: FR4 + AcrylicMeasuring Frequency Range: 1Hz~50MHzSignal Frequency: Max.30VPower Supply: USB or external power(5~12V) or 9V batteryPCB Board Size: 6.3 * 4.9cm / 2.48 * 1.93inFinished Product Size: 7.3 * 5.8 * 1.7cm / 2.87 * 2.28 * 0.67inProduct Weight: 67g / 2.36ozPackage Size: Approx. 12.5 * 8 * 2cm / 4.92 * 3.15 * 0.79inPackage Weight: Approx. 97g / 3.42ozNote:Please remember to wear anti-static gloves if the node is installed to prevent electric shock.Package List:1 * DIY Frequency Tester Kit1 * USB Cable1 * User Manual(English)