It is a Red/green Digital Voltmeter DC 12V 24V Voltage Tester, Operating Voltage: DC3.3 ~ 30V , Display: 0.52" LED red/green, It has small size, high efficiency, long term stable and reliable quality,easy installation and use. Applications: suitable for most of electrical bike, motor and etc, will be a good tool to detect voltage.

• Operating Voltage: DC3.3 ~ 30V
• Operating Current: <20mA
• Display: 0.52" LED red/green
  
• Dimension: 54 L*30 W * 27H mm
• Installing Size: 47.2*27.3
• Testing Rate: >500mS/once
• Testing Accuracy: 1%（±1 digit）
• Protection for Reverse connection: yes

• Minimum Operating Voltage: + 3.3V
• Maximum Working Voltage: + 30V (The highest voltage can't be over 30V)
• Working Temperature: -10 ~ + 65 ℃
• Working Humidity: 10 to 80% (non-condensing)
• Working Pressure: 80 ~ 106kPa
• Sun Exposure: no direct exposure

• Easy and convenient installation: two wires, just connect the red wire to the positive and connect the black wire to the negative.
• Built in trimmer potentiometer, it is simple to do a calibration work.
• Reverse connection protection, no worry it will burn your meter when get it connected reversely.
• Wide application: suitable for most of electrical bike, motor and etc, will be a good tool to detect voltage.

• Red wire: +
• Black wire: -

• 1 x Waterproof Digital Voltmeter ( 2 Wires )