LED Digital Voltmeter DC

0.4" LED Digital Voltmeter DC 1.7-25V Lithium Ni-MH Battery Power Monitor with 2.1mm DC jack

Measure range: DC1.7-25V
(Does not need a Power Supply, Measure 1.7-25V directly )
Minimum input: DC1.7V
Maximum input: DC25V
Permissible Error: 1% (+ / - 1 Digit)
Display: three 0.4 "LED digital tube
Display Color: Red
Refresh rate: about 500mS
Current consumption: about 5-20mA
Operating temperature: -10 °c ~ 65 °c
With Reverse polarity protection