Technical specifications
Power Source: 2 AA 1.5V batteries (included). Replace with disposable batteries (lithium preferred).
Timer Settings: Probe (10 second Smart Probe activated by skin contact), 10, 20, 40, 60 minutes, and continuous.
Current: 0 to 600 µA adjustable in 50 µA increments.
Frequency: 0.5, 1.5, or 100 Hz (pulses per second).
Waveform: Bipolar asymmetric rectangular waves, 50% duty cycle, 0 net current.

Five year warranty
Each Alpha-Stim® M is warranted to be free from defects in materials and workmanship under normal use for a period of five years except for replacement of batteries and accessories. See Owner’s Manual for complete details.