At less than 4 grams, no batteries and less than $40 seems a no brainer to have one.
If you’re not familiar it is primarily used to located someone buried in an avalanche. It is now being used with SAR. In conjunction with a Spot, In-Reach ect….. Seems like it would help SAR locate you a lot faster than without it.
Feel free to read about it at the link below.

