CORE BELT — TOTAL LENGTH UP TO 116 CM (45.7 IN) · ONE SIZE, FULLY ADJUSTABLE
CHRIS CUOMO’S FAVORITESGYM IN A BOX®
ACTIVATE YOUR WHOLE BODY. 15 MINUTES A DAY.
ONE POWERFUL SET. FIVE MUSCLE BOOSTERS. FULL-BODY ACTIVATION.
The 5-in-1 Full Body ULTRA Muscle Booster Kit is a full-body wearable system powered by patented ToneUp15® Pulse Body StimFit Technology. Five wireless pieces sit directly on bare skin and make your muscles contract on their own — no gym, no wires, no gel pads.
$199 · FREE SHIPPING FROM BEVERLY HILLS, CA · 30-DAY RETURNS ON REGULAR-PRICE ITEMS
SHOP NOW, PAY LATER — interest-free installment options available at checkout.
What’s in the Box
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1 core belt — abs, waist and lower back, with 360° coverage.
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2 arm/thigh wraps — arms and thighs.
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2 arm/calf wraps — arms and calves.
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Wireless controllers with displays — rechargeable, one controller runs each piece.
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18 integrated activation pads — built into the pieces, nothing sticky to apply or replace.
- Charging cable and instructions.
How It Works — In Plain Words
One 15-minute system covers your abs, arms, legs, calves and glutes. Patented microcurrent signals travel through the 18 integrated contact pads and make your muscles contract on their own — like doing hundreds of crunches, squats and presses while you relax. You choose the zone, the program and the intensity. With consistent daily use, these contractions help tone and strengthen your muscles. Individual results vary.
Why It Stands Out
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Full body, one session: abs, arms, thighs, calves and glutes activated together in one automatic 15-minute session — or focus on a single zone.
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Targeted zones: each piece is shaped for the muscle group it trains, including 360° core, waist and lower-back coverage from the belt.
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Your level, your pace: adjustable intensity on every piece. Modes are preset pulse patterns; levels are the strength — start low and build up.
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100% wireless freedom: rechargeable controllers, no wires, no gel pads, no gym equipment — at home, while traveling, or during light movement and recovery.
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Low-impact and joint-friendly: real muscle activation without pounding your knees or back.
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For women and men (unisex).
How to Use
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Strap the pieces on bare skin at each zone you want to train, so the pads sit firmly against your skin. Clothing can go over the pieces — never between the piece and your skin.
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Press the controller button and choose your program and intensity, starting low and increasing gradually.
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Live your life — work, relax or move around while the automatic 15-minute session runs and shuts off on its own.
Built-in load detection: output only activates when the pads have secure skin contact. Charge each controller fully before first use.
What to Expect
You will feel your muscles activating from your very first 15-minute session. Visible toning builds with consistent daily use alongside your routine — this is muscle activation, not a fat-loss promise, and individual results vary.
Measurements
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Core belt: 45.7 × 5.9 in (116 × 15 cm)
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Arm/thigh wrap: 20.9 × 5.1 in (53 × 13 cm)
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Arm/calf wrap: 16.9 × 3.9 in (43 × 10 cm)
System or Single Belt?
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5-in-1 Full Body ULTRA Muscle Booster Kit — choose the kit if you want your whole body covered: abs, arms, legs, calves and glutes in one system.
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UltraTone™ Core Master — choose this single belt if you only want premium core, waist and lower-back training in a slim, discreet design.
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MagicTone™ StimFitBelt™ — the everyday core belt: abs & core activation plus sauna-effect sweat and posture support in a corset design.
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SlimCore™ — the warming single belt: tones and tightens abs while you sweat, with heating warmth and a skin-rejuvenation function.
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Men’s StimFitBelt™ — the same core training concept in a men’s fit, with sauna-effect sweat and posture support.
Questions, Answered
Can I train several zones at once?
Yes. Use the five wireless pieces together for a full-body session, or wear a single piece to focus on one area.
How do I charge it?
The controllers are rechargeable with the included charging cable. Charge them fully before first use.
Care
Wipe pads gently after use. Do not immerse controllers in water.
During weight-loss journeys—including for adults using GLP-1 medications—maintaining muscle-focused movement, resistance training, and adequate nutrition remains important. This wearable can support muscle engagement as part of that broader routine; it is not intended to prevent or treat muscle loss.
Add to cart — activate your full body in 15 minutes today.
IMPORTANT SAFETY INFORMATION
Adult use only. Do not use during pregnancy or with a pacemaker or implanted electronic device.
CONSULT YOUR DOCTOR: If you have a medical condition, an implanted device, or any concerns about whether this product is appropriate for you, consult your doctor before use.
GYM IN A BOX® consumer fitness devices are intended for fitness and wellness use and are not intended to diagnose, treat, cure, or prevent any disease or medical condition. Individual experiences and results may vary.
PATENTED TECHNOLOGY • CREATED BY CRISTIANI'S BALANCE FITNESS & NUTRITION, LLC
Our proprietary wearable technology is protected by U.S. patents, including U.S. Utility Patent No. 11,925,799 B2 and U.S. Design Patent No. D846,836 S.
GYM IN A BOX® USA | ToneUp15® StimFit Technology
Designed and developed in the USA • Established 2015.
