What defines the E-Stim Systems 2B?
⚡2 isolated channels
⚡17 program modes
⚡2 audio modes
⚡Built-in microphone and stereo audio input
⚡Optional PC/Mac link
⚡9 V battery or external power supply
Where it fits
A practical choice for users who prefer an established manufacturer platform with direct controls, audio functions and optional linking.
A separate product family
The Series 2B is not part of the ET312 lineage. Its own platform provides two isolated channels, seventeen program modes, audio operation, a built-in microphone and optional computer linking.
Why it appears in 312 comparisons
It is frequently cross-shopped because it occupies the same broad category of feature-rich dual-channel e-stim power boxes. The underlying design philosophy, controls and ecosystem are nevertheless distinct.