Dual User & Guest Mode -- Our blood pressure monitor supports three independent users (Guest user cannot view history data on the monitor), up to 240 records (120 for each user), and intelligently averages the last three readings to provide you with a more comprehensive and accurate health data.LED Color Backlit Display -- Clear color screen, three colors backlit color screen display, blood pressure at a glance. Which displays all measurements clearly with large numbers even in dim light.Comfortable & Adjustable Arm Cuff -- Compatibility design. Our BP Monitor eqquipped with adjustable D-ring to improve accuracy, is suitable for adult arm 8.7-16.5 inches (22-42cm) in circumference.Rechargeable Battery -- Our BP Monitor comes with built-in rechargeable battery and designed with auto power-off function, so you don't have to replace the disposable battery frequently.Ultra Thin for Easy-carry -- The ultra-thin lightweight sleek design emphasizes mobility and convenience so that you can easily take it with you wherever you go."