The Philips HeartStart FRx AED is the most durable AED manufactured by Philips today. This AED is ideal for aviation companies to create a "heart safe" environment while in the air. The FRx AED offers low-cost of maintanence with its 4 year long-life battery and its adult pads have an expiry date of every 2 years. The Philips HeartStart FRx Aviation Bundle complies with TSO C-142.