Features: Using low temperature drift crystal oscillator, high precision DDS frequency synthesis technology, high frequency stability, resolution up to 0.001HZ, at low frequency accuracy up to 0.001HZ. Can be up to 13 kinds of waveform output, to meet different needs. Color 1.8TFT LCD display, digital keyboard direct input frequency, intuitive and convenient operation. With timing shutdown, signal light brightness adjustment, screen backlight brightness adjustment. FG-300 is the multifunctional, high-precision, portable signal generator, which can generate sine wave, square wave, triangle wave, forward sawtooth wave, reverse sawtooth wave, electrocardiogram, half wave, Loren, Gaussian, Sinc, Exponential rise, exponential fall, and 7.83HZ Schumann wave and other waveforms. The onboard spiral antenna can be used as a Schumann wave generator, can be widely used in electronic research and development, production testing, education and teaching, maintenance, audio testing and other fields. All setting parameters can be automatically saved, and there is no need to set them in the next startup. Specifications: frequency range: sine wave 0.001Hz-200kHz (where the output amplitude is flat to 100 kHz, the output amplitude will decrease and the distortion will increase with the further increase of the frequency), and other waveforms will be 0.001Hz-20kHz (but the upper limit of adjustable frequency is not limited. If the requirements for distortion and shaking are not high, the use frequency can be further increased). output amplitude: 2. 5V output impedance: 330 ohms display: 1.8 inch TFT display supply voltage: USB TYPE C Color: green Material: PCB+components+plastic There are differences in printing and silk-screen printing due to different batches, which will not affect the use; t