Lightweight, rugged and reliable, the Philips HeartStart FRx defibrillator can withstand rough handling, extreme temperatures, and dusty or wet surfaces. Designed for use in harsh settings, it can withstand up to 500 kg (1,100 lbs) and drops from 1.2 m (4 ft). The Philips HeartStart FRx defibrillator features intuitive, step-by-step voice instructions, including CPR guidance, and an audible metronome to help guide basic life support (BLS) responders while treating a suspected sudden cardiac arrest