Model: Sonoline B - Quantity: 1 - Color: White - Material: ABS - Rated voltage: DC 3V - Display: 45 mm x 25 mm LCD - Backlight: On / Off - Complied with: IEC 60601-1:1988 + A1:1991 + A2:1995 - Anti-electroshock type: Internally powered equipment - Anti-electroshock degree: Type B applied part - Fetal heart rate performance: - Measurement range: 50bpm~240bpm - Resolution: 1 bpm - Accuracy: +/- 2bpm - Power: - Power supply: 2 x AA battery (Not included) - Probe performance: - Nominal frequency: 2.0MHz - Working frequency: 2.0MHz +/- 10% - P-: - Iob - Ispta - Isata - Ultrasonic output intensity - Features: - Handheld & easy to use - Built-in speaker - Battery energy indication - Packing list: - 1 x Fetal heart tester (length: 62cm) - 1 x English user manual