The Sonotrax Pro Fetal doppler has been designed to meet the examination requirements of obstetricians and midwives. It features a clear LCD display with backlight, and has three modes of operation (real-time FHR display, averaged FHR display and manual). The Sonotrax Pro is a high performance device supplied with a sensitive 2MHz waterproof probe. Features: • Accurate FHR detection with clear sound • Three operating modes • High sensitivity interchangeable probe • Ergonomic design, compact and light • Easy-to-use • Large backlight LCD display • Automatic and manual FHR counting • Alkaline battery - LR6, AA 1.5V x 2 (not supplied) • NI-MH Battery AA, R6, 1.2V x 2 (not supplied) • Automatic power-off