Optimal - Stryker - SensiMedical 11425-000012 Replacement Shoulder Strap, For Use with the LIFEPAK® 1000 Defibrillator (Continental US Only) The Trainer 1000 provides realistic training for LIFEPAK® 1000 AED users. It utilizes the same screen messages, audible tones and voice prompts as those found in LIFEPAK 1000 Defibrillator to guide users-in-training through simulated analysis, energy delivery and prompted CPR intervals.