This signal generator is professional product to generate sine/triangle/square wave.Features:High resolution, can generate sine/triangle/square waveforms.Frequency range: 1Hz-1MHz.Adjustable frequency and amplitude.Frequency adjustment features coarse tuning and fine tuning.Wide power supply range, use 9-12V external power or 9V battery(NOT Included).Specifications:Type: DIY Kit / Semi-finished Product (Optional)Voltage Supply: 9-12V DC InputWaveforms: Square, Sine & TriangleImpedance: 600 Ohm + 10%Frequency: 1Hz-1MHzSINE WAVEAmplitude: 0-3V at 9V DC InputDistortion: Less than 1% (at 1KHz)Flatness: +0.05dB 1Hz - 100kHzSQUARE WAVEAmplitude: 8V (no load) at 9V DC InputRise Time: Less than 50ns (at 1KHz)Fall Time: Less than 30ns (at 1KHz)Symmetry: Less than 5% (at 1KHz)TRIANGLE WAVEAmplitude: 0-3V at 9V DC InputLinearity: Less than 1% (up to 100KHz) 10mAPackage Size: Approx. 12 * 8 * 2cm / 4.72 * 3.15 * 0.8inPackage Weight: 69g / 2.46ozPackage List:1 * Signal Generator1 * User Manual (English)Note:Semi-finished Product: circuit board has welded, while the transparent shell need to assemble by yourself..Items from Sheng Xinshun's shop