Handhold fetus/mother monitor(doppler) Ergonomic design, compact and light Easy to use The same techniques as used in fetal heart monitor Accurate fhr detection Fhr displayed with curve and value Maternalspo2and heart rate is available Li-ion battery and battery capacity indicator High sensitive transducer Pulsed wave/continuous wave doppler working mode Date and time function. Long time continuous use ( more than 5 hours) Auto power off for energy saving Specifications Ultrasound working frequency: 1.0mhz /2.0mhz Working mode: pulsed wave/continuous wave Range: 50-210 bpm Precision: 1 bpm Accuracy: ía 2 bpm Isata: < 5 mw/cm2 Display: 60x37mm dot or seg lcd display Speaker: 0.5--1 w Doppler dimension: 30(depth) x 85(height) x 130(width) mm Net weight : 275 +/- 25g For spo2 probe:100 g Package size: 275(depth) x 80(height) x 185(width) mm Total weight : 650 g(including the gel, gel weight is 150 g)