ACR OLAS EXTENDEROLAS EXTENDER The ACR OLAS EXTENDER is a small, portable, wireless range extender that provides the flexibility of scaling your OLAS GUARDIAN Engine Kill Switch and OLAS CORE MOB Alarm Systems for use on larger vessels. The OLAS EXTENDER effectively increases the length of the virtual tether which exists between the OLAS transmitters (OLAS Tag and OLAS Float On) and the OLAS Receiver (OLAS CORE, OLAS GUARDIAN,). Users on vessels up to 80 ft. in length