1) Dynamo LED Flashlight Clock 2) Emergency Light 3) Used for camping, emergency tools, ... gift 4) SOS,Whistle,Compass 8 In 1 Dynamo Emegency LED Flashlight Clock Working Principle: This product adopts the principle of cranking ... digital devices (e.g. mobile phones) via connection cable. Multifunction flashlight includes compass, clock, snooze function and temperature display, etc. Functions ...