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PZEM 020 10A AC Digital Display Power Monitor Meter Voltmeter Ammeter Frequency Factor Meter (Without CT) Witty Fox 3.7V 1000mAh Li Ion Battery The TM1637 4 Digit Display combined The TM1637 4 Digit Display combined with an IR Proximity Sensor is a versatile electronics module perfect for building interactive projects Modular Optical System: Replaceable aspherical lenses with anti reflective coatings reduce chromatic aberration and improve contrast in varying lighting conditions and power alarms to trigger notifications when parameters exceed safe operating limits High Precision Sensing: ±1% voltage accuracy
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