Description:
Specifications: Executive Standard: EN61266:1995 Ultrasonic frequency: 2.0MHz±10% Ultrasonic intensity: ≤10mW/cm² Comprehensive Sensitivity: ≥90dB FHR range: 60--210bpm(±2bpm) FHR alarm range: ≤100bpm or  ≥160bpm Isptp: ≤0.1MPa Battery: 9V dry battery (optional for 8.4VNi-MH rechargeable batteries and charger) Maximum audio output intensity: ≤1W Doppler frequency: 100--3000Hz Static continuous working time: ≥2h Automatic Dormancy time limit:1 minute Working temperature: 10-40℃ Humidity: ≤80% Atmospheric pressure: 86--106kPa

Description:
Specifications: Executive Standard: EN61266: 1995 Ultrasonic frequency: 2.0MHz±10% Ultrasonic intensity: ≤10mW/cm² Comprehensive Sensitivity: ≥90dB FHR range: 60-210bpm(±2bpm) FHR alarm range: ≤100bpm  or  ≥170bpm Isptp: ≤0.1MPa Battery: 14.4V/1600mAh Ni-MH rechargeable batteries Adapter input voltage: AC 110V±10% 60Hz / 220V±10% 50Hz Rechargeable battery input voltage（no load）: DC 24V±1V Maximum audio output intensity: ≤2W Doppler frequency: 100--3000Hz Static continuous working time: ≥6h Working temperature: 10-40℃ Humidity: ≤80% Atmospheric pressure: 86--106kPa