Due to State and Federal Law, we sell Syringes and Needles only to the Medical Facilities. Superior sound quality * Extended battery life * Enhanced probe sensitivity * One-year full warranty * The large, informative display shows battery life, signal quality and extended 50 to 220 bpm heart rate * The 5 MHz vascular probe is designed to ease location of deeper vessels * The medium width beam and pencil-style shape provides optimum sensitivity and ease of use *