MemTech Hydrogen H2 Meter BLE-9002 Digital pH Meter
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Bluetooth Hydrogen rich pen Temperature Meter high-sensitive replaceable electrode HD LCD Display Button introduceON/OFF Button:1. Short press ON/OFF Button to turn on and turn off device2. Long press ON/OFF Button to turn on and turn off bluetooth functionCAL button: Long press CAL button to calibrate hydrogenHOLD/TEMP button:1. Short press HOLD/TEMP button to lock the value2. Long press HOLD/TEMP button to convert ? and ? button (mode conversion)
