... Whistle,Compass 8 In 1 Dynamo Emegency LED Flashlight Clock Working Principle: This product adopts the principle of ... mobile phones) via connection cable. Multifunction flashlight includes compass, clock, snooze function and temperature display, etc. Functions: 1. ... Cranking for power generation.2. Digital alarm clock with snooze function; temperature display.3. Charge digital devices ...