Place of Origin: China Brand Name: OEM Model Number: U3-02 Power Source: Electric Warranty: 1 Year After-sale Service: Online technical support Material: Plastic Shelf Life: 1years Quality Certification: CFDA Instrument classification: Class II Safety standard: GB9706.1-2007 Battery: D.C. 3V (2 X AA)BATTERIES Size: 12mm*8mm*3mm Function: Inspect Fetal Heart Rate Frequency: 2.5MHz Weight: 153g (without battery) Type: Doppler Ultrasound Equipment