Casing is high-impact ABS plastic. Weight of The BT5pro unit is only a few ounces - very lightweight. Volts Peak-Peak into typical 4kohm load. Waveforms are Microchip Quartz Crystal-Controlled for precise frequency output. Auto-shutoff time of 20 minutes.
Output is transformer coupled so that no direct current can appear at electrodes.
The algebraic sum of positive and negative-going pulses is zero. This obviates any possibility of electrolysis, ion migration, or polarization. Low battery indicator. Low battery circuitry illuminates Red LED light when battery voltage falls below 5.2 Volts. Output is disabled when low battery condition present.