This wireless alarm system for sailboats, large boats, pools, campsites or the beach that sounds an alarm when any of its sensors are submerged underwater or go beyond approximatley 100' from the receiver. Using RF technology it tracks the wireless sensors, and when the signal between the receiver and sensors is broken "The Screamer" sounds a pulsating alarm of 105 decibels. Each receiver can monitor up to four people. This system includes: 1 loud pulsating alarm (105db), 1 receiver, 1 personal sensor, AAA batteries, Owner's Manual, & Carabineer Clip.

$149.99 After $25. manufacturer rebate! Rebate link: http://autotether.com/at/cape-hatteras-marine-rebate