Connected Detector -0.28 Inch 3 Wire LED DC 0-100V Digital Voltmeter Digital Voltage Tester Green Highlights generic brand 0.28 Inch 3 Wire LED DC 0-100V Digital Voltmeter Digital Voltage Tester Green Description: Voltmeter three-wire digital, 0.28" LED display, mini size, reverse connection protection. Measure voltage range 0-100V, requires DC4-30V external power supply. Can work directly in 5v, 9v, 12v electric circuit, 24v Stable fragrance and high precision Standard size and easy installation Specification: Material: Plastic, Electronic Components Size: Approx 3.1 x 1.1 x 1.0cm / 1.2 x 0.4 x 0.4 inch Cable length: about 17cm Three-wire working voltage: 4.0 ~ 40V (with reverse protection) Three-wire detection voltage: 0.0 ~ 100V Display mode: LED digital tube at 0, 28 inch 3-digit Display color: red, yellow, blue, green Working current: <20mA Install hole size: 23 x 10mm Refresh rate: 200ms/times Measurement accuracy: 3% Operating temperature : -10C to 65C Package includes: 1 piece LED digital voltmeter Note: This voltmeter can also be used with two wires. Two-wire working voltage: 4.0~40V (with reverse protection) Two-wire measuring voltage: 0.0~40V