NEC U321H User Manual page 68

Regulations
*6 Operational temperatures
0 to 2500 feet/760 m in the range of 50° to 95°F(10° to 35°C)
2500 feet/760 m to 5000 feet/1500 m in the range of 50° to 95°F (10° to 35°C)
5000 feet/1500 m to 10000 feet/3000 m in the range of 50° to 86°F (10° to 30°C)
Set [FAN MODE] to [HIGH ALTITUDE] when using the projector at altitudes approximately 2500
feet/760 m or higher.
UL/C-UL Approved (UL 60950-1, CSA 60950-1)
Meets DOC Canada Class B requirements
Meets FCC Class B requirements
Meets AS/NZS CISPR.22 Class B
Meets EMC Directive (EN55022, EN55024, EN61000-3-2, EN61000-3-3)
Meets Low Voltage Directive (EN60950-1, TÜV Approved)
Appendices
61 ... English