KAATSU C5 Blood Flow Restriction System

KAATSU C5 — The Next Evolution in Blood Flow Restriction Training The KAATSU C5 is the most advanced standalone KAATSU controller ever made. Built on the proven foundation of the best-selling C4, the C5 delivers major upgrades across the board — a longer-lasting replaceable battery, quieter operation, customizable saved sessions, and a tougher, more travel-friendly design. Whether you're training, rehabbing, or recovering, the C5 gives clinics, coaches, and serious athletes a precision tool that works on their terms — no phone, no app, no compromise. Upgrade your performance. Extend your device life. Train anywhere. What's New in the C5 Longer-lasting, replaceable battery — ~50 cycles vs. 30 with the C4. Swap in a fully charged backup and keep going. Quieter operation — Built-in noise reduction makes the C5 ideal for planes, clinics, offices, and anywhere silence matters. Savable Custom Modes — Dial in your perfect settings once, save them to the device, and access them in one touch every session. Longer device life — Replaceable battery + upgraded internal components = a device built to last. Lanyard + belt clip included — Wear it around your neck or clip it to your waist. Your call. Redesigned AirBands (if selected) — More elastic, more flexible, and easier to pack for travel. What's in the Box KAATSU C5 controller Newly redesigned arm and/or leg AirBands (if selected) Quick Start Guide Carrying case USB-C charging cable 2 sets of connector tubes (one set for arms, one for legs) Single limb plug Lanyard Post-purchase education Built for Serious Use Clinics & Rehab Professionals Standalone operation means reliable, repeatable sessions without relying on a phone or app. Precision you can count on with every patient. Coaches & Team Staff Save custom protocols for different athletes and access them instantly. The rugged design holds up to high-frequency, multi-user environments. Dedicated Athletes Train, recover, and rehab wherever you are. Quiet enough for the plane, tough enough for the field. Frequently Asked Questions How is the C5 different from the C4? The C5 builds on the C4's proven performance with major quality-of-life upgrades: a larger removable battery, quieter operation, a redesigned user interface, customizable saved sessions, and a more rugged build. It's everything you loved about the C4 — made better. How is the C5 different from the B2? The C5 is KAATSU's most durable system, designed for professional and high-frequency use. Unlike the wireless B2 (which connects via Bluetooth and an app), the C5 operates as a fully standalone unit — no phone required. It's the go-to for clinics, teams, and serious users who need precision and reliability in any environment. See the Product Comparison page for a full breakdown. Will the connector tubes get in the way during workouts? Most users find the lightweight, flexible tubes barely noticeable during typical KAATSU exercises, walking, or rehab movements. If you want a completely tubeless experience for maximum freedom of movement, check out the KAATSU B2. Will the C5 work with my existing C-series AirBands? Yes. The KAATSU C5 is fully compatible with all existing C-series AirBands — no need to buy new bands. Is the C5 difficult to use? Not at all. The redesigned interface makes setup faster and simpler than any previous KAATSU generation. How do I know what size AirBands to order? Sizing instructions are available on the AirBands page. Does the KAATSU C5 have Bluetooth? No. The C5 is a fully standalone device — all controls are on the unit itself. No phone, no app, no connectivity required. This makes it especially reliable in gyms, clinics, and field environments where you need it to just work.