SMAKN&reg; 2 Wires Dc 7-100v RED LED Panel Digital Display Voltage Meter Voltmeter Measure Range: DC 7-100V (2-wire access) Display: Three 0.56" RED LED digital tube Measurement accuracy: 1% (+ / -1 digit) With reverse polarity protection;Suitable for 36V/48V/60V/72V electric vehicles Dimensions: 48mm x 29mm x 21mm;Cutting size: 45.5mm x 26.5mm