0% smaller (typ) by volume
Easily fits to lifejacket*
Retractable Antenna
7 Year Battery Life
7 year warranty
24+ hour operational life
High brightness strobe light >1candela
66 channel GPS receiver
Unique mounting clip
Operates on the global Cospas Sarsat rescue system
Free to use, no subscription charges
Supplied with free flotation pouch
 
https://oceansignal.com/products/plb1/