OLAS (Overboard Location Alert System) Crew Tag & Strap *Pack of 4The ACR OLAS Tag is a Wearable Crew Tracker that integrates OLAS (Overboard Location Alert System) technology. The ACR OLAS mobile application technology detects a break in its ‘virtual tether’ to the tag within 8 seconds of a Tag going missing. The mobile phone(s) then sound an alarm and records the latitude and longitude of the incident using the phone or tablets GPS. ACR OLAS then aids the crew with the MOB recovery, clearly directing them to the GPS location where the MOB occurred with clear visual signals and bearing data. ACR OLAS stores all location data and time of incident required by the rescue services. Activate Solo mode on the app (2G phone signal required) when boating alone and the OLAS app will automatically text message (SMS) your emergency contact with your GPS coordinates in the event you get separated from your boat. Users can track up to 6 different OLAS Transmitters with 1 phone/tablet and each individual OLAS Transmitter can be tracked by an unlimited number of phones/tablets. If you want to track more OLAS Transmitters, add the ACR CORE base station or Guardian Engine Kill Switch and MOB alarm scaling your system to monitor up to 15 OLAS Transmitters. The ACR OLAS Tag is a compact, ‘Smart’, man overboard system transmitter. It can easily attach to adults, children, pets and objects such as overboard floatation devices or Personal Locator Beacons. It is small and portable and can easily be taken from boat to boat to ensure you are always protected. Each tag is supplied with a universal silicone wrist strap with stainless steel buckle and a pre-installed CR2477 Battery (user replaceable).Start small or go big, the ACR OLAS is the only solution that can scale to meet your boating needs. The range of the ACR OLAS transmitters allows for coverage on vessels up to 40 ft in length. However, the transmitter is part of a larger scalable ecosystem of ACR OLAS products (transmitters and receivers) that offer additional safety features and can be combined to track large crews on larger vessels. You can even ditch your phone and utilize your ACR OLAS Tag with the OLAS Guardian Engine Kill Switch or OLAS Core Base Station as part of a more permanent solution. ACR OLAS is a must have addition to your safety toolkit. It provides a simple and cost-effective safety solution for everyone on board including adults, children and even pets. Features: ACR OLAS Free Mobile App Integration Versatile Attachment Solution (Wrist worn, life jacket, dog collar, attach to Personal Locator Beacon)Waterproof (IP 67)Bluetooth® 4.1 CompatibleLow Battery Indicator with ACR OLAS app3,500 Hours Per Battery When ArmedUser Replaceable Battery (CR2477)Expand system coverage from 40 ft. to 100 ft. using the OLAS Extender