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... to convey the fetal heart rate and other information to the mother and medical staff. The speaker is an important part of the entire monitoring equipment, providing real-time information about the physiolog...
...speaker VR3 bass booster speaker for mobile phone Product Quick Details: 1. Powerful 35W speaker. 2. Bluetooth 4.2 + EDR. 3. Power box built-in battery: 8000mAh. 4. Playing time: 18-hrs. 5. Function Button +...