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This small size Bluetooth 4.0 transceiver module allows your device communicate with IOS Android.
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HM-10, Bluetooth module using TI CC2540 chip, configuration 256Kb space, support,Pairing password and other parameters convenient and flexible.
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Input voltage: 3.3V / 5V only need one power supply.
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The serial port level is the same as the power supply voltage
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Internal with logic level conversion circuit,No need external 5V level to turn into a 3.3V level,The power input port with anti-circuit. To avoid accidental power plug reversed, leading to the module burned