The HeartSine Paediatric Pad-Paks are for children under 25kg or between 1 to 8 years of age. The paediatric Pak is specifically designed to deliver a shock in a lower electrical energy dose. Because of the child's physical characteristics the insertion of the Pad Pak will override the CPR feedback provided by a 500P. The HeartSine Pad-Paks contain both electrodes and batteries in one cassette. Therefore you can be sure that there is no need to worry about the expiring component of the device since it is completely refreshed and ready to be used again after an emergency. Compared to relying on batteries that have been in a device for multiple years this concept is much better than relying on them. Additionally it is much less expensive throughout the device's lifecycle. Suitable for use with the HeartSine defibrillator series: the PAD 350P the PAD 360P and the PAD 500. The cartridges have a shelf life of four years from the date of manufacture and provide 60 shocks or continuous monitoring over a period of six hours. Installation is straightforward. There is just one click required to install the cartridge.