1.Power display, voltage display, with dual UsB ports 2.Equipped with switch, low power consumption in standby mode 3.The wiring is simple, and two wires can be connected to the positive and negative poles of the battery 4.Screw free buckle installation, waterproof, with waterproof plug 5.LCD high-definition display screen<br><br>Installation size: 42 x 38.5mm (1.65 x 1.51inch) Line length: 5 centimeters (1.95 inche) Input voltage: DC12-24V (adjustable) USB voltage: 4.8-5.05V USB current: 0-2.5A (shared by two ports) Sleep power consumption: 15-20uA Voltage accuracy:+/-0.1V Working temperature: -15-60 ℃ Suitable for lithium batteries: 3/6 series (adjustable) Colour:Black Material:Plastic<br><br>Package Contents: 1x voltage meter battery monitor 1x power cord<br><br>Only the above package content, other products are not included. Note: Light reflection 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.