Philips defibrillators perform a daily, weekly and monthly self-test to eliminate the need for manual calibration. May be converted to an AED trainer with the use of Adult or Infant/Child Training Pads Cartridge (sold separately)Philips AEDs use advanced technology to respond to your actions, utilizing SMART Analysis to assess the heart’s rhythm, and a Quick Shock feature which allows the device to deliver a shock within 8 seconds. Post shock guidance on CPR will followWhat’s in the box: Philips HeartStart OnSite Defibrillator, 1 pre-installed battery, 1 set pre-installed SMART Pads Cartridge, 1 standard carry case (has space for spare battery and spare pads cartridge), quick set-up Guide, maintenance booklet, quick reference guide, owner’s manual8-yr warranty for AED, 4-year warranty for battery, pads are warrantied until expiration date. Other accessories include 1-year warrantyPlease contact Philips directly with any questions regarding the performance or operation of your HeartStart Products. Replacements are permitted for warranty purposes only