With 3 temperature settings, a rapid heat-up function and electronic temperature regulation, the HK55 is a much more user-friendly alternative to the traditional hot water bottle; it can even be machine washed at 30°.As with all Beurer heat pads, the HK55 is fitted with the patented Beurer Safety System (BSS) and has an automatic switch-off function after 90 minutes use so you can relax.