Portable --- Small size, powered by DC 9V, easy and portable for use.DDS frequency range --- 1Hz-65534Hz, high-speed frequency () output up to 8MHz.Adjustable --- DDS signal amplitude of the offset amount can be adjusted separately by two potentiometers.Wide DDS signals --- sine ve, square , , reverse , triangle , the ECG and noise .Easy Use --- LCD display for clear reading, intuitive touch buttons. The power automatically the last used configuration.Function:UP output waveform selectDOWN output waveform selectLEFT output frequency - output frequency +STOP / the output stop / "UP" key waveforms order:ECG: electrocardiogram (in the OFF state, the "left" and "" to set the output frequency. Middle button , all of the following waveform set) : reverse : Triangle: triangle Square: square Specifications:Display: 1602 LCDSection into the Value: 1, 10 , 100, 1000, 10000 HzOffset: 0.5pp-5VppAmplitude Amount: 0.5Vpp-14VppPower Cable Length: . 70cm / 27.56inchSize: 135x80x32mmcolour: as shownMaterial: ABSPackage Contents:1 x Signal generatorOnly the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real . The measurement allowed error is +/- 1-3cm.