This fetal heart doppler is a hand-held obstetrical unit￡? which can be used in hospital￡? clinic and home for daily self-check of fetal heart rate by pregnant women. Easy to operate and carry. <br> <br> <strong>Features:</strong> <br> Excellent performance with 3 working mode: real-time FHR display mode￡?averaged FHR display and manual mode and easy to operate !#!amp!*! switch. <br> High quality: contains ultrasonic signal transmitter and receiver￡? analog signal processing unit￡? FHR calculating unit. <br> Large LCD display with backlight function￡? clear to see. <br> Have built-in speaker with volume control and headphone socket for audio output￡? connecting earphones or recorder. <br> With battery status indicator￡? low power inspection of the battery. <br> Auto shut-off. <br> The probe can be changeable and in high sensitivity. <br> Without radiation￡? does no hurt to fetal. <br> Pocket hand-held design￡? portable￡? in beautiful appearance. <br> <br> Note: This product is suitable for use after 12th week of pregnancy. <br> <br> <strong>Specifications:</strong> <br> Safety: Comply with IEC60601-1:2006 <br> Anti-electroshock Type: Internally Powered Equipment <br> Working System: Continuous Running Equipment <br> EMC: Group 1 Class B <br> FHR Measuring Range: 50-240BPM (Beat Per Minute) <br> Resolution: 1BPM <br> Accuracy: +/-2BPM <br> Power Consumption:?′0.8W <br> Auto Shut-off: After 1 minute without signal <br> Power Supply: 2 * 1.5V DC Battery (Size: AA LR6) <br> Probe Nominal Frequency: 3.0MHZ <br> Probe Working Frequency: 3.0MHZ +/-10% <br> Negative Peak Sound Pressure: P-:?′0.5MPa <br> /spta?′50mW/c?O <br> /?￡b:?′10mW/c?O <br> Ultrasonic Output Intensity: 1sata?′5mW/c?O <br> Effective Radiating Area of Transducer: 208mm2 +/-15% <br> Working Temperature: 5?? to 40?? <br> Working Humidity: ?ü80% <br> Atmosphere Pressure: 70kPa to 106kPa <br> Main Body Size: 13 * 7 * 3.5cm /?5.12 * 2.76 * 1.38in <br> Probe Size: 10 * 2.6 * 2.6cm /?3.94 * 1.02 * 1.02in <br> Item weight: 192g / 6.78oz <br> Package Size: 23.5 * 13.3 * 6.5cm /?9.25 * 5.24 * 2.56in <br> Package Weight: 409.5g / 14.44oz <br> <br> <strong>Package List:</strong> <br> 1 * Fetal Doppler <br> 1 * Gel <br> 2 *?1.5V Battery <br> 1 * User Manual (English)