10. Environmental Conditions Temperature: Operating: 5° to 40°C (41° to 104°F) For the TM-U300C/U300PC, when the temperature is 30°C (86°F) or more, the operating humidity is limited. Storage: -10° to 50°C (14 to 122°F) (excluding paper and ribbon) Humidity: Operating: TM-U300C/U300PC: 20% to 80% (non-condensing) TM-U300D/U300PD: 30% to 85% (non-condensing) Storage: TM-U300C/U300PC: 20% to 90% (non-condensing, excluding paper and ribbon) TM-U300D/U300PD: 30% to 90% (non-condensing, excluding paper and ribbon) 33