BG01 Frequency Generator vs OTXUGK YK01 Frequency Generator

These two are near-identical on paper: both cover 0.01 Hz to 200 kHz, both default to the 7.83 Hz Schumann frequency, and both offer sine, square and inverted square waves over USB-C. The Frequency Generator BG01 is a plain ABS box with a 1 W draw and no stated output voltage; the OTXUGK YK01 adds a stated 3 V output, a 0.01 Hz resolution spec and a built-in 1–100 Hz detector range. Buy the YK01 if you want documented output levels and a detector; buy the BG01 if you only need a simple, light signal source and prefer its green ABS body. Neither is a medical device, and no credible reviewer or owner data supports healing claims for either.

• Choose the Frequency Generator BG01 if you want the lightest, simplest USB-C signal box and don't need a stated output voltage or a detector.
• Choose the OTXUGK YK01 if you want documented 3 V output, 0.01 Hz resolution and a 1–100 Hz detector range in a compact PCB-based unit.