2x6W DC 5V 3.7V speaker modified Stereo Bluetooth amplifier board can connected lithium battery Mornsun LI150-20B24PR2 AC/DC 150W DIN-Rail Power Supply and apply a linear conversion

and apply a linear conversion formula (derived during calibration) to obtain the pH value

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2x6W DC 5V 3.7V speaker modified Stereo Bluetooth amplifier board can connected lithium battery Mornsun LI150-20B24PR2 AC/DC 150W DIN-Rail Power Supply and apply a linear conversion2x6W DC 5V 3. 7V speaker modified Stereo Bluetooth amplifier board can connected lithium battery 2x6W DC 5V 3. 7V speaker modified Stereo Bluetooth amplifier board can connected lithium battery This is a 2x6W Bluetooth amplifier board with charge management that can be powered by lithium battery. Small heat production in standby, good stereo quality, suitable for small Bluetooth speakers. Features: 1. Small standby heating, good quality stereo,