KNOW YOUR BLOOD PRESSURE AT A GLANCE! This wrist monitor gives you a quick, accurate, easy-to-read measurement. The screen color on the backlit LCD display changes to reflect normal blood pressure range (green), pre-hypertension (yellow), or hypertension (red). Also displays systolic, diastolic and pulse readings. Stores up to 90 readings for 2 users. One size fits most. Storage case. Uses 2 AAA batteries (not included).