The Philips HeartStart HS1 Semi Automatic Defibrillator is a portable device for professionals and untrained bystanders to provide life-saving intervention during sudden cardiac arrest. It delivers clear voice instructions guiding users through resuscitation, from pad placement to CPR. This AED assesses heart rhythm and advises shocks, requiring only a button press to deliver treatment. Pre-connected SMART Pads and automated self-testing ensure immediate readiness, while energy levels adjust automatically for infants and children when the Infant and Child SMART Pads cartridge is installed. Key features Dimensions: 21 × 19 × 7cm, weighing 1.5kg with battery Adult energy: 150 Joules, reduced to 50 Joules for children Battery life: 4 years installed, 5-year shelf life SMART Pads: 2-year shelf life Backed by an 8-year manufacturer's guarantee for reliability in critical situations.