The worlds smallest personal locating AIS Man OverBoard device with integrated DSC. AIS (Automatic Identification System) Integrated DSC transmitter (Digital Selective Calling)* 30% (typ) smaller than competitors Automatic activation Simple lifejacket integration** 7 year battery life 24+ hours operational life 5 year warranty*** Fast accurate positioning * DSC functionality is subject to regulations of country. ** Always refer to the manufacturer for specific instructions before installing this product directly to your life jacket. *** Subject to warranty statement. (Note: When used in commercial applications the warranty period is restricted to two years.)