1 ultra-small super-mini night light camping dedicated mobile power but when the desktop computer lights; 2.0.3w ultra-low-power over 2835 chips led long lighting test heat is no problem; 3.5000mAh mobile power full power sustainable lit around 100 hours; 4 Operating current 40 mA high luminous efficiency energy saving 5 can be placed in your wallet you can also hang on a key very portable. Power supply: standard USB interface as long as you can plug USB 5V power mobile power notebooks netbooks desktop computers can be. 6 This USB light uses three bright luminous efficiency LED lamp beads lamp beads in parallel independently of each design even a bad one does not affect the other two lights normal use.