These maintain a steady frequency and amplitude. They are excellent for beginners learning to gauge their tolerance levels. The sensation is predictable and consistent.

False. Unlike vibration (which causes temporary numbness due to capillary constriction), estim targets nerves directly. Users report increased sensitivity over time.

If a client sends you a 1-hour file, don't just say "that’s 1 hour of work." Calculate the complexity, multiply the time, and price accordingly.

Not all audio files are created equal. Here is how I quote projects based on the raw files I receive:

Most smartphones output a DC offset voltage. If you plug a phone directly into a DIY stereostim box, you can deliver a constant, burning current. Always use a USB sound card or a device known to have zero DC offset.

You need to determine the complexity.