Power: 6WChip: PolysiliconPeak power: measured 3W (sunny day light under the conditions of the test income)Open circuit voltage: 6VOperating voltage: with the voltage regulator operating voltage 5VShort circuit current: 1.35AWorking current: 1.2AConversion efficiency: 18.5%Output port: rear single USB interface outputProduct weight: 370g / blackDimensions: 27X18X1.5cmSurface material: ultra-white cloth pattern of glass (light transmission is good, durable, long service life)Life: about 25 years