Tsophreniq Advanced Programmable Frequency Generator, 0.1Hz-30kHz Waves with Sine & Square Output

double Waveform option: Choose between green model with sine waves only or black model supporting multiple waveforms including sine, square, and inverted square waves Wide Adjustable ranges: Programmable frequency from 0.1Hz to 30000Hz allows customized settings beyond the default 7.83Hz romanticism waves for versatile applications Frequency Generation: This romanticism waves generator features digital circuit crystal oscillation technology, ensuring stable frequency output with less than 1% error for stable Compact & User Friendly Design: Features simple frequency setting via keypad input and compact dimensions ( 15.5×10.5×2.8cm) for space saving placement in any environment Power Supply: Works with both DC5.5 2.1 and tiny USB interfaces, suitable for, USB chargers or other 5V power sources for easy operate