DESCO MEDICAL INDIA Fetal Heart Doppler: 1. Screen: 4.50 cm TFT screen 2. Heart Rate Range:50-240 bpm 3. Heart Rate Accuracy:±1% or ±1bpm whichever is greater 4. Ultrasound Frequency:2.5MHz 5. Ultrasound Sensor Size: Φ2.5cm 6. Ultrasound Sensitivity: >110dB 7. Speaker: Φ40mm built-in speaker 8. Auto Shut Off: 2 minutes no signal 9. Battery Type: 1 set Li-ion rechargeable battery 10. Waterproof Grade:IPX1 11. Interface: 35cm earphone output 12. Weight: around 215g (including probe, excluding battery) 13. Dimensions:14.2(H) x 6.8(W) x 2.8(D)cm Features: * Advanced auto-correlation fetal heart rate processing algorithm enables high accuracy * Dynamic digital noise reduction technology delivers best ever and clearest sounds for optimum FHR detection * High resolution color screen provides numeric and trace presentation of fetal heart rate * High sensitivity wide beam 2.5MHz probe ensures optimum performance from early gestation right through to delivery * Rechargeable via USB socket guarantees low running costs and negates the need to change batteries.