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Regarding the noise coming from your device, make sure a fresh battery is installed. A weak battery can cause noise. Interference can be caused by nearby electronic devices (e.g. high frequency electronics, cell phones, cordless phones, etc.). Make sure there is plenty of lubricating gel between the probe and the abdomen. Some slight noise does occur when moving the probe from one location to another on the abdomen and sufficient lubrication will decrease this significantly. Check to see if you can hear your own heartbeat clearly without static (when the prob is stationary). However, if this hasn't resolved the problem then feel free to reach out to us at Customer Service.
Valerie - Wusic Customer Service