Features: True lcd display Light weight, easy for use Fhr waveform and numeric display;optional temp probe Low ultrasound level, safe to fetus Specifications: Working frequency: 2.5mhz Working mode: pulsed doppler Ultrasound strength: < 5mw/cm2 Unit dimension:3.2*9.6*13.8cm Unit weight: 170g with battery Moq: 25pcs/carton Carton size:0.53(l) *0.43(w)*0.41(h) Carton volume weight: 19kg