Weighing on 3.3 lbs this defibrillator can be carried easily to a patients side. With calm and clear instructions the OnSite Defibrillator guides you through each and every step of defibrillation, including CPR Coaching. The OnSite is the first commercial defibrillator available without a prescription. It is designed to be the easiest and most reliable defibrillator available. The OnSite has a long-life battery and also has automatic self-tests.