Summit Doppler™ LifeDop® 250 ABI System is an efficient, economical, and portable solution for performing ankle-brachial index (ABI) exams. Highly accurate, quickly obtaining the ABI to assist with the detection of peripheral arterial disease (PAD). Quick calculation chart determines whether results are normal. Features automatic waveform scaling to avoid clipped waveforms. Highly sensitive 8 MHz bi-directional vascular probe with optimal beam shape is proven effective for locating surface vessels with ease and allows the system to obtain pressure at two ankle sites (dorsalis pedis and posterior tibial). System includes handheld Doppler with automatic frequency calibration and waveform memory, 8 MHz probe, two cuffs, aneroid, portable rechargeable printer, ABI reference materials, and carrying case.LifeDop System: 2-3/4"W x 5-3/4"L x 1-3/8"D • 0.7 lb. • Power source: 3 AA alkaline batteries (included) Printer: 3-5/16"W x 5-5/16"L x 1-5/8"D • 0.6 lb. • Power source: 3.7V lithium rechargeable battery (included) • Paper type/size (max): Thermal, 58 mm wide, 33 mm diameter • Resolution: 48 mm wide, 8 dots/mm, 384 dots/line • Printout length: 38 mm total with headerAdditional Printer Label Paper for LifeDop 250 ABI System also available, sold separately.