40Ambient conditionsTemperature during storage and transport: -20 °C to +60 °C (-4 °F to +140 °F)Humidity for storage and transport: 8% to 80% (relative), non-condensingTemperature in operation: +10 °C to +35 °C (+50 °F to +95 °F)Humidity in operation: 15% to 80% (relative), non-condensingThe C-NW foot control is protected against vertically falling drops of water (IPX1 as per IEC 60529)Pollution level: 2Overvoltage category: IIAltitude: up to 3,000 m above sea levelCharger power cord: Class II medical electrical equipmentType BF applied part (not suitable for intracardiac application)Classification according to Paragraph 6 of the General Specifications for the Safety of Medical Electrical Equipmentaccording to IEC 60601-1/ANSI/AAMI ES 60601-1Technical dataHandpiece: Internally poweredTemperature informationTemperature of the handpiece at the operator side: max. 55 °C (max. 131 °F)Temperature of the handpiece at the patient side: max. 50 °C (max. 122 °F)