FIT Rife

About FIT Rife

FIT Rife designs and builds the FIT series — a line of frequency delivery devices that has evolved continuously since the first concept in 2012. Each generation has been built to solve a specific engineering problem: how to deliver frequency more precisely, more flexibly, and more reliably than the model before it.

A Decade of Engineering Evolution

FIT I — the foundation. Conceptualised in 2012, the FIT I was built around handheld electrodes, delivering frequency via voltage pulses through direct skin contact.

FIT II — a different approach. First prototyped in 2021, the FIT II was engineered specifically for use with a PEMF coil, delivering frequency through current pulses rather than voltage — a fundamentally different power delivery method suited to a different application. Compact and lightweight, with a recessed screen for durability and a modular internal build for easier servicing.

FIT III — bringing both together. Launched in 2015, the FIT III combined the full capabilities of the FIT I and FIT II into a single device, letting users choose handheld electrodes or a PEMF coil from one unit (one at a time - not simultaneously). The original model sold over 800 units before a 2021 redesign introduced a 4.3" capacitive touchscreen and four composite banana jacks, replacing the original resistive screen and brass jacks. The FIT III now has a USB-C charge port as of July 2026.

FIT IV — simultaneous delivery. Built in direct response to customer demand, the FIT IV (2021) introduced multi-channel power routing — running a PEMF coil and handheld electrodes simultaneously, or two sets of electrodes at the same time. The upgraded Version 2, integrates the PEMF coil directly into the device and now has a USB-C charge port as of July 2026.

Built to Last

Every device in the FIT line runs on a standard 18650 lithium-ion battery and is engineered around durability — from the FIT II's impact-protected recessed screen to the shared, reinforced enclosure of the FIT III and FIT IV. As the product line has matured, internal architecture has moved from modular components toward a streamlined, singular PCB design, improving reliability without sacrificing serviceability.

The Manufacturer Brand

FIT Rife is the manufacturer behind the FIT series. For over a decade, that engineering was sold to customers under other companies' branding — including Wave Technologies, who resold FIT devices under names like Wave 4, Wave Pulse, Wave Kompak, and WavePuls between 2014 and 2026, without FIT Rife's own name on the product.

That arrangement has ended. FIT Rife no longer sells through Wave Technologies or under any of those names — every device is now sold under the FIT Rife brand, representing the manufacturer that has designed and built this technology since 2012.