NERVE STIMULATOR, PERIPHERAL, COMPACT W/ BALL ELECTRODES AND BATTERY. NERVE STIMULATOR, PERIPHERAL, COMPACT W/BALL ELECTRODES, 9V BATTERY, LEAD SET (ALLIGATOR), AND ZIP CASE by Anesthesia Associates. This unit is a small handheld battery powered peripheral nerve stimulator. The device has a variable voltage output which is current limited. The output strength control wheel is a relative indicator not a absolute one. The simplicity of the device is such that very little true testing is needed to verify operation.