The easiest and cheapest life insurance for a traveller. A loud whistle for emergencies and LED-lights for visibility and walking in the tropical night.
Did u know that the international whistle code goes as follows:
“One blast – where are you?
Two blasts – come to me
Three blasts – i need help!
If you hear any of these signals, you should respond with one blast. Each blast should last for 3 seconds.”