Summit LifeDop L150 Series Ultrasound Doppler Systems w/o Display Ships Same Day If Order Is Received Before 1:00 P.M. Monday Thru Friday. Features: • Non-display unit with superior sound quality • Extended battery life • Enhanced probe sensitivity • Interchangeable probes (2 mhz, 3 mhz, 4 mhz, 5 mhz, 8 mhz, 2 mhz waterproof) • One-year full warranty • Additional probes can be purchased separately below. L150: The L150 features a non-display unit with superior sound quality, extended battery life, enhanced probe sensitivity, interchangeable probes, and a one-year full warranty. L150R: The L150R features a non-display unit with superior sound quality, extended battery life, enhanced probe sensitivity, interchangeable probes, and a one-year full warranty. It includes a charging system where you don"t have to worry about overcharging or draining the batteries. L150A: The L150A features a non-display unit with superior sound quality, extended battery life, enhanced probe sensitivity, interchangeable probes, and a one-year full warranty. It includes a built-in Audio Recorder (A First in the Market).