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By certification 
* Using the latest high performance and low power consumption microprocessor technology.
* Automatic memory material code and sound velocity value, convenient to use.
* Use “USB data output” and “RS-232 data output” to connect with PC.
* Provide “Bluetooth ™ data output” choice.
* Automatic memory material code and sound velocity value, convenient to use.
* Use “USB data output” and “RS-232 data output” to connect with PC.
* Provide “Bluetooth ™ data output” choice.
