What is the difference between the CENTURY 2400, ARISTA 2000, ARISTA SD+ and CENTURY 2100?
The CENTURY 2400 is a preset unit used for acute pain. It is usually used for a short period of time. i.e. broken ankle The ARISTA 2000 is a multi-modulated unit. It is used for a chronic pain patient who wears the unit for a substantial amount of time per day. The ARISTA 2000 is for someone who needs a modulated frequency so the body can’t accommodate. The body can’t figure out the frequency and override it because the frequency is constantly changing. The CENTURY 2100 is used when a Doctor prescribes a specified timed treatment. It is used with a patient who wears the unit during all working hours. This is the only TENS that comes with a timer option. The Arista SD+ is the only TENS unit that gives you the option of using an AC Adaptor or 9 Volt Battery. This is the only TENS where the channels can be controlled independently.
