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Citadellsvägen. 19
S-211 18 Malmö

+46 40 690 49 00

With over 25 years of experience, nok9 AB is the world-leading supplier of complete solutions for reference test tools in wireless charging and optical media.



CATS II testers are ideal for certification of Qi medium-power products, up to 15 W, and under Power Class 0 this medium-power classification is now called the Extended Power Profile. CATS II is also equipped for testing low-power products, making this instrument essential in research and development – especially for the higher-power, faster-charging products of the future.

CATS II is the most nimble and powerful wireless power certification tool in the industry. Ideal for certification of Qi Extended Power Profile products up to 31.5W as well as testing Baseline Power Profile products, uniquely forward-compatible, and empowered with the industry’s only ISO 17025 accredited calibration service, CATS II is an essential instrument in research and development – especially for the higher-powered, fast-charging products of the future.

CATS II Reference Testers: The State of the Art

Our CATS II reference testers sets the world standard as the most powerful wireless charging reference testers in the market – both for the industry today as well as the wireless charging landscape of tomorrow.

Developed through our shared vision with the WPC on the future of wireless charging technology, CATS II is designed to flexibly adapt to new standard updates and developments, making it uniquely forward compatible.

CATS II testers are WPC certified and compatible with Qi, Rainbow and Typhoon wireless charging standards. The Mobile Device Tester (MDT) is for product development and compliance testing of mobile devices and power receivers, while the Base Station Tester (BST) is for base stations and power transmitters.

Compatible standards:


WPC standard for wireless charging


Proprietary standard for charging Apple Watch 

Proprietary standard for Samsung Fast Charge

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*Apple and Apple Watch are trademarks of Apple Inc. Its use in this document is without authorization by Apple.