Warm portable and comfortable sit for long periods and the cold can get right into your bones so whether you are enjoying the great outdoors in a wheelchair or scooter or just sat in your favourite chair this heated chair pad provides the gentle warmth to stop that chill setting in powered by 3x aa batteries not supplied it heats up to 50c in 5 minutes is completely portable and stays warm for up to 3hrs on one set of batteries measures l41cm xw355cm xh5cm 16in x14in x2in