This is a Return-to-Base battery service for the Ocean Signal rescueME MOB1. The service includes full testing before and after the service functionality is checked. The batteries, plastic and seals are all renewed. The old Battery Expiry Label will be replaced, showing the new Battery Expiry Date. Once the order has been received, we will send you return address information. The turn around is fast, so you won't be without your SART for very long at all.