Summit LifeDop 150 Non-Display Hand-Held Doppler with Audio Recorder INCLUDES YOUR CHOICE OF ONE PROBE: Obstetrical Probes - 2MHz Probe, 3MHz Probe, 2MHz Waterproof Probe ---- EchoHeart Transvaginal - 5MHz Probe ---- Vascular Probes - 4MHz Probe, 5MHz Probe, 8MHz Probe