Press the push button switch to turn on the middle LED light.
Press the push button switch a second time to turn off.
Press the push button switch a third time to turn on all three LED's
3LED component, 2 file switch, 1 / 3, LE brightness 13000-15000, can be hand-cranked power generation, a minute hand can be light about 15 minutes to 40 milliamperes lithium rechargeable cell phone batteries,