AmmetersParameters:Measurement voltage: DC 4.5-30V two wire connectionDisplay: Three digit 0.56 LEDRefresh speed: approximately 300mS/timeMaximum input: DC 30V (there is a risk of burning out above 30V)Minimum input: DC 4.5V (below 4.5V, measurement inaccurate or not displayed)Minimum resolution: 0.01V (<;10V)/0.1V (>10V)Resolution: 1% ± 1 bitWorking temperature: -20 ~65 Size: Approximately. 48mm × 29mm × 22mm (length * width * height)Hole size: approximately 46 * 27mm<;23mA==========Hign-concerned Chemical : Model Number : AC 50-380V DC 4.5-30V Digital Voltmeter AmmeterDIY Supplies : ELECTRICALDisplay Type : Analog and Digital Ammeters Hign-concerned Chemical : Model Number : AC 50-380V DC 4.5-30V Digital Voltmeter Ammeter DIY Supplies : ELECTRICAL Display Type : Analog and Digital Color AC50-380V red Model TZCASRJFM Brand Name TZCASRJFM Part Number TZCASRJFM Manufacturer TZCASRJFM Item Dimensions 0.39 x 0.39 x 0.39 inches