Super Deal digital voltmeter voltage meter OEM ODM digital voltmeter Size: 48mm*48mm,72mm*72mm,96mm*96mm,96mm*48mm PLEASE CONTACT US FOR DETAIL MANUAL We are the manufacturer in Wenzhou of China and specialize in producing digital electrical meters and temperature controller, humiture controller, and so on. DIGITAL AMMETER, VOLTMETER, FREQUENCY METER, POWER METER, POWER FACTOR METER, PHASE METER, COMBINED METER, MULTIFUNCTIONAL METERS,SINGLE-PHASE, THREE-PHASE...