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Gaming company Razer has made what they claim is world's smartest face mask – complete with a built-in microphone.

The prototype, revealed at the tech convention CES, claims to amplify the users' voice – to prevent muffled speech.

The design includes active ventilation – exhaling warmer exhaled air whilst pulling in cooler air.

The company says the mask is classified as an N95 surgical mask, however the BBC has not reviewed the product.