· Baby Heartbeat Tracker · FHR Range: 50BPM - 240BPM · Resolution: 1bpm · Accuracy: ±2BPM · Power Consumption: < 0.8 W · Voltage: DC 3.0 V · Audio Output Power: Requirement:3.6V DC-4.2V DC · Power source: 2 x AA 1.5V alkaline batteries · Auto Shut-OFF: After 1 minute no signal, power off automatically · Suitable Using Range: Suitable for use after the 12th week of pregnancy · Temperature: +5°C~+40°C · Humidity: 80% or less · Atmospheric Pressure: 70kPa – 106kPa · Weight: 180g (6.4oz) including tw |