Feature: _x005f_x000D_ 1. This voltmeter has a volume of 0.36 inches, a range of DC 0-40V, 2-wire access, breaking the conventional voltmeter. It is the latest design. It can work directly in 5V, 9V, 12V, 24V circuits without voltage regulation. _x005f_x000D_ 2. Equipped with two wiring, easy access to the car/battery car/motorcycle internal line, with reverse connection protection function, wiring will not burn. _x005f_x000D_ 3. It can be used to monitor battery voltage and master battery voltage status in time. It can also be used for voltage measurement of other products. _x005f_x000D_ 4. Ultra-low starting voltage, red minimum 2.5V, green minimum 2.7V, blue minimum 3.0V. If conditions permit, the recommended voltage range DC 4V-30V is the best. _x005f_x000D_ 5. Good product stability and high measurement accuracy. _x005f_x000D_ 6. Appearance adopts standard size, easy to install. _x005f_x000D_ 7. Power supply adopts polar protection circuit. _x005f_x000D_ _x005f_x000D_ Specification: _x005f_x000D_ Product model: HW-804 _x005f_x000D_ Input voltage: DC4-40V _x005f_x000D_ Working Current: 100K ohm _x005f_x000D_ Lead length: 15cm/5.9'' _x005f_x000D_ Display mode: 0.36 "LED, red, blue, green (color optional) _x005f_x000D_ Installation hole: central hole spacing: 27.5 mm/1.08''; aperture: 3 mm _x005f_x000D_ Size: 22.5*14.4*9mm/0.88*0.56*0.35'' (excluding installation ears) _x005f_x000D_ Packing weight: 5g _x005f_x000D_ _x005f_x000D_ Warm Tips: _x005f_x000D_ The maximum input voltage of the two wires should not exceed 40V, otherwise there is a risk of burnout. _x005f_x000D_ Use voltage within 40V (many peers can only use less than 30V). _x005f_x000D_ _x005f_x000D_ Note: _x005f_x000D_ Please allow 1-3mm differs due to manual measurement. _x005f_x000D_ Due to the different display and different light, the picture may not show the actual color of the item. Thanks for your understanding. _x005f_x000D_ _x005f_x000D_ Included: _x005f_x000D_ 1 X 0.36 inch DC4-40V Digital Voltmeter 1. This voltmeter has a volume of 0.36 inches, a range of DC 0-40V, 2-wire access, breaking the conventional voltmeter. It is the latest design. It can work directly in 5V, 9V, 12V, 24V circuits without voltage regulation. 2. Equipped with two wiring, easy access to the car/battery car/motorcycle internal line, with reverse connection protection function, wiring will not burn. 3. It can be used to monitor battery voltage and master battery voltage status in time. It can also be used for voltage measurement of other products. 4. Ultra-low starting voltage, red minimum 2.5V, green minimum 2.7V, blue minimum 3.0V. If conditions permit, the recommended voltage range DC 4V-30V is the best. 5. Good product stability and high measurement accuracy.