1)Wind for one minute :4 LED Lights lighting 20 minutes/red alarm lights glimmer about 4 hours. 2)With hand pressing dynamo, magnetic and alarm. 3)Super bright LED lights last for years                                                                                                      4)With  solar and  moble charge function.                                                                                                                                      *Includes: NI-CD BATTERY *4-piece brightness + 8-piece red LEDs