A 1Hz-65KHz LCD 1602 DDS Function Signal Generator is a device that is used to generate a variety of different electrical signals. It consists of a microcontroller, an LCD display, and a circuit that generates the signals.

This signal generator is capable of generating signals with a frequency range of 1Hz to 65KHz, and it uses a DDS (Direct Digital Synthesis) function to generate the signals. DDS is a technique that uses a digital waveform to generate an analog signal, which allows for precise control of the signal's frequency and waveform.

The signal generator also has an LCD display that is used to show the current frequency and other information about the signal. This can be useful for adjusting the signal and monitoring its output.

Signal generators are often used in a variety of applications, including testing and measurement, electronics development, and scientific research. They can be a useful tool for generating precise and stable electrical signals for a variety of purposes.

Function (waveform) signal generator can produce some specific periodic time function waveform (sine, square, triangle, sawtooth, etc.) signal, the frequency range is 1Hz-65534Hz. 
Features: 
Small size, powered by DC 7V-9V, easy and portable for use. 
DDS frequency range: 1Hz-65534Hz, high-speed frequency (HS) output up to 8MHz. 
DDS signal amplitude of the offset amount can be adjusted separately by two potentiometers. 
DDS signals: sine wave, square wave, sawtooth, reverse sawtooth, triangle wave, the ECG wave and noise wave. 
LCD display for clear reading, intuitive 5 buttons for convenient operation. 
The power automatically restore the last used configuration. 
Key Functions: 
UP output waveform select. 
DOWN output waveform select. 
LEFT output frequency -. 
RIGHT output frequency +. 
STOP / START the output stop / start. 
"UP" key waveforms order: 
ECG = electrocardiogram wave (in the OFF state, the "left" and "right" keys to set the output frequency. 
Middle button start, all of the following waveform set). 
Rev Sawtooth = reverse sawtooth. 
SawTooth = sawtooth. 
Triangle = triangle wave. 
Square = square wave.