4-80V Mini Water-proof Voltmeter 3-Digital High-accuracy LED Screen Voltage Tester Meter Diagnostic-tool

This is a very practical mini voltmeter, portable, water-proof,dust-resistant and shock-proof. It has 2 wires to connect and has reverse polarity protection. Clearly display the testing results in the LED screen and can be widely used in automobile, motorcycle and other rugged environment. You should own it to make your work easier.
Features:
LED screen is coated with epoxy, thus it is water-proof, dust-resistant and shock-proof.
High-accuracy: adjust the accuracy automatically.
Has black and red wire to connect, with reverse polarity protection.
Can be fixed with two holes on each side.
Widely used in automobile, motorcycle and other rugged environment.
Notice:
DC 4-80V version is applicable for battery voltage detection of 12V/24V automobiles and motorcycles. It can also used for voltage detection of 36V/48V/60V.
72V battery cars are not allowed because it will exceed 80V after full charging! 
Specifications:
Color: Red / Green / Blue / Yellow (Optional)
Input Voltage: DC 3.5-30V / DC 4-80V (Optional)
DC 4-80V Version only supplies three colors: Red, Blue and Green, please know that!
Working Temperature: -10°C-65°C
Refresh Rate: 1 Second
Accuracy: (+/-)1%
Display: LED Screen
Item Size: 3.5-30V: 4 * 1.2 * 1.7cm; 4-80V: 4.2 * 2.4 * 2.1cm
Item Size: 3.5-30V: 4 * 1.2 * 1.7cm; 4-80V: 4.2 * 2.4 * 2.1cm
Item Weight: 3.5-30V: 8g / 0.29oz; 4-80V: 25g / 0.89oz
Package Weight: 8.5-27g / 0.3-0.96oz
Package List:
1 * Water-proof Voltmeter