Which version has the greatest resistance?

Dear customer, I am writing to you at 22:00 Japan time. Paste your review below; RPMSports Powerball promises high quality that sets it apart from other manufacturers' products, such as smoothness of rotation, quietness, and robustness. It is sold in more than 20 countries around the world and has a wide range of users from professional athletes to children. Not only strength training results, The results of research on the effectiveness of rehabilitation and injuries were announced at a famous university, and it was certified as a medical device in South Korea. It is also proven to be effective in rehabilitation and injury prevention. These achievements are proven because of the high quality of the Powerball made by RPMSports. In recent years, many Powerball imitations have been sold, We hope that you will not be deceived by other products' unreliable sales performance, exaggerated expressions and misleading product descriptions. We often receive feedback that it would have been better if they had purchased a Powerball made by RPMSports from the beginning. We recommend the highest quality Powerball for the best training. We apologize for not meeting your expectations. Thank you for your continued support of Kyoto Clean Service.

What does 280 Hz mean

That it's not 279 Hz. Nor a 281 Hz. I hope this helped.

Does this ball vibrate at 280Hz? Do you feel a sense of vibration or not? I don't understand the relationship between 280Hz and 17,000 rpm

You can feel the ball rotate or vibrating while using it.

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RPM Sports NSD Powerball 280 Hz, Model with Auto Start Function, Grip Strength, Wrist, Forearm, Muscle Training

RPM Sports NSD Powerball 280 Hz, Model with Auto Start Function, Grip Strength, Wrist, Forearm, Muscle Training

4.3/5

Product ID: 762141133

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Details

Color
Black
Material
Polycarbonate
Brand
Powerball
Item Weight
263 Grams
Style
Auto-start

🔇280 Hz ultra-quiet rotor

⚙️18,000 rpm max speed

🛡️16 kg max load capacity

Description

💪 Elevate your grip game with silent power and precision!

AUTO START FUNCTIONALITY - Seamlessly engage your workout with effortless auto start technology.
WHISPER QUIET 280 HZ ROTOR - Train anytime without distraction thanks to ultra-smooth, vibration-free operation.
VERSATILE FOR ALL ARM SPORTS - Perfect your game in baseball, golf, tennis, basketball, and more with targeted muscle training.
PRECISION POWER AT 18 000 RPM - Experience unmatched rotational speed for elite wrist and forearm training.
SAFE EFFECTIVE MUSCLE CONDITIONING - Build grip and wrist strength without the risk of overloading muscles like heavy weights.

The RPM Sports NSD Powerball 280 Hz is a cutting-edge wrist and forearm strength trainer featuring a high-performance 280 Hz rotor that delivers up to 18,000 rpm with minimal vibration and noise. Its auto start function ensures effortless use, while its robust design supports loads up to 16 kg, making it ideal for safe, effective muscle conditioning across a variety of arm-centric sports and rehabilitation needs.

Specifications

Model Number	280Hz Autostart Classic
Color	Black
Hand Orientation	Ambidextrous
Material	Polycarbonate (Military Grade)
Sport Type	Model with auto start function
Batteries Included	No
Diameter	7 Centimeters
Target Audience	Jr, Men's, Women's
Maximum Weight Recommendation	16 Kilograms

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TrustScore 4.5 | 7,300+ reviews

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I loved the variety of products available. Will definitely shop again.

2 months ago

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Fantastic experience overall. Will recommend to friends and family.

1 month ago

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

Anita G.

Good experience, but the tracking updates could be better.