Manufacturer's product descriptions:
Safe: Ultrasound dosage is under 50% of the standard.
Portable: light measure, handset, portable.
LCD display: LCD display FHR
Loudspeaker: Built-in loudspeaker & clearly
Power off: Auto- power off function.
Working time: Adopt with recharger battery, constantly working 10 hours over when full of recharger.
Durable: Huge capacity battery, work more than 12 hours after full charge.
Convenience: Single key control. Automatic battery recharge and protection.
Sensitivity: Monitor 9 weeks above unborn baby’s blood wall pulsate.
Three model account: Real-time, ten seconds average & handly account the FHR.
Probe: Solid and durable, anti-shock and anti-falling down.
Power: DC 7.2V
Weight:Main body 0.12kg
Warranty information is located in the specifications section
Dimensions: 4.51 in x 3.24 in x 1.3 in
Weight: 16.54 oz