Meet the Sound Grenade: a compact device with a 120-decibel alarm that allows you to get the help you need when in trouble. The siren works for 30 minutes unless the pin is returned to the device. The Sound Grenade is capable of working under water and in 14F to 104F weather. It weighs under 1 oz. Costs under $20 at this time.
Also see:
*Our articles may contain aff links. As an Amazon Associate we earn from qualifying purchases. Please read our disclaimer on how we fund this site.
