Description: Measuring range: DC 3V-30V ; Working current: ?13mA Max Input: DC 32V. The device can be damaged if input is over 32V Display: Three 0.36 "digital tube ; Display Color: Blue Measurement accuracy: 0.1% Refresh rate: about 300mS / times Input impedance: About 100K Ohm Size: approx. 23 x 15 x 10 mm Wire length: approx. 15cm Screw holes measures: 28mm Package Includes: 1 Piece LED Display Digital Voltage Voltmeter Panel Note: Color maybe slightly different due to different monitor. The above size is measured by hand, please allow slightly difference. Thanks !