Features: 1. Display intensity:5000cd/sqm 2. Viewing Angle: 140 3. Operation Voltage: DC 12V 4. Additional Power: 42W (the maximum power for one unit). 5. Using Life: Over 80000 hours 6. Wireless Module Working Frequency: 900MHz ~ 928MHz 7. Communication Distance: over 200m 8. Tempareture:-40 dgrees to +80 degrees.