3 шт. 30x10x8 мм 0 28 дюйма ультра-Маленький цифровой измеритель напряжения

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The voltmeter small size, range DC DC0-100V, 3-wire products common to break the conventional voltmeter, is the latest design, can work directly 5V, 9V, 12V, 24V and other circuits, without regulation.
Equipped with three wiring, easy access to the car / battery car / motorcycle car line, with reverse protection, the line will not reverse burning.
Used to monitor the battery voltage, battery voltage status in a timely manner can also be used for voltage measurement of other products.
Note 2-line use of the maximum input voltage can not exceed 30V, otherwise there is a danger of burning down
Note: The three-wire use of voltage range 0-100V
Shell Color: Black + Red + Yellow
Light Color: Red Light / Yellow Light / Green Light / Blue Light
Material: ABS + PVC
3 lines Operating voltage: 4.0 ~ 40V (with reverse polarity protection)
3-wire detection voltage: 0.0 ~ 100V
Working current: Less than 20mA
Display: 0.28 inch LED,
Overall dimensions: 30 x 10 x 8 mm (L x W x H)
Installation hole: 23 x 10 mm
Measurement rate: more than the equal 200mS / time
Measurement accuracy: 0.003
Extreme working conditions
Low working voltage: + 4.0V
Maximum working voltage: + 40V
Operating temperature: -10 ~ +65 Celsius
Working humidity: 10 ~ 80% (no condensation)
Working pressure: 80 ~ 106kPa
Sunlight: No direct exposure
Product stability, high precision
Appearance using standard size, easy installation
Power supply polarity protection circuit
Quantity: 3 Pcs
Package Contents: 3 x Ultra-small Digital DC Adjustable Voltage Meter
Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.