The color of the transformer will be change depend on Different batch Working temperature: -20 degrees to 70 degrees, the advanced Aihua capacitor temperature is 105 degrees 10,000 hours, 70 degrees is greater than 5 years, and normal temperature is about 20-50 years (not recommended for use above 70 degrees).Input characteristics:Input voltage range: AC50V-277V DC70V-390VNo-load power: Output characteristics: Multiple voltage modules can be used in parallel to meet the needs of large currents in small spaces.Output voltage:12V -0.05+0.3V no load and full load, light load minus 0.1V, rebound when heavy load, 50% load ripple 60mVOutput current: 12V0mA-300mA, enters constant current mode when fully loaded,Test resistance: 40 ohms (12V) Output indicator: green lightOutput power: 3.5W, efficiency is about 70-80%Output protection: over voltage, over current, over temperature, over work, short circuit protection, etc.Include: 1 x module