Needs to be pre-installed within the lifejacket*• 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• Height 134 x Width 38 X Depth 27 mm*Always refer to the manufacturer for specific instructions before installing this product directly to your lifejacket. **Subject to warranty statement. Note: When used in commercial applications, the warranty period is restricted to 2 years.