Body Sculpting Machine Professional area What does Oxygen concentration 90±3%

What does Oxygen concentration 90±3% mean

If you can send me pictures I will appreciate it

CAUTION: The shower grab bar must be reattached before each use

Core Components    PLC

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Body Sculpting Machine Professional area What does Oxygen concentration 90±3%Specifications Type STANDING Target Area Body, Legs Arms Plugs Type UK, Other, EU, JP, US, AU, Za, It Place of Origin Guangdong, China Material ABS & Plastic Waterproof Yes Brand Name GLM Model Number C 041 Power 4500W Handle 4 Handles Magnetic vibration intensity 0 13. 46 Tesla Frequency 1 150hz System Air Cooling System Technology EMS Electrical Muscle Stimulation Voltage 110V 220V 50 60Hz