Pros:

• Perfect for adventurers since most of the time cellular network is really an issue
• We can already save ourselves from mini heat attacks knowing that some of the members have lost their way
• This is very convenient to use as there is no need for any connection
• Bluetooth range connectivity is quite huge (up to 2-5km)
• Lightweight and highly portable

Cons:

• Since this is a minute object, one must be extra careful not to misplace this one.