Medisana BU 535Features: Upper arm blood pressure monitor for continuous monitoring of blood pressure Detects heart arrhythmias WHO scale in stoplight colours Display is especially large and shows date and time After about one minute of inactivity, the device switches off automatically Indicates when the batteries need to be changed Memory for 120 values for 2 users Device is operated with batteries Batteries: 4 x AAA (Micro) Dimensions (W x H x L): 9.5 x 4.1 x 15 cm Weight (without batteries): approx. 235 g Colour: white