Ozeri BP2M CardioTech Premium Series Digital Blood Pressure Monitor for $23.60. Shipping is free on orders over $49. If needed, use this Filler Tool to pad the order for free shipping. Here is a screenshot for reference. It features Advanced Hypertension Indicator color codes the Systolic and Diastolic readings in green (normal), orange (prehypertension) and red (hypertension). Most places have it for about $33.