Features: brand new and high quality There are 5 types, single lithium 3.7v, 2 string lithium 7.4v, 3 string lithium, 4 string lithium 14.8v, 12v lead-acid, choosing based on your need. 5 LED indicaotr,display more intuitive and beautiful. Wide range of use, lithium battery, lead acid battery, lithium iron phosphate, electric vehicle battery electric equipment can be used. Battery power display panel with under voltage indicator. With reverse connection function, even if the positive and negative connection will not burn. Specifications: Material: ABS Size: 22x22mm/0.86x0.86 in Connect the positive and negative terminals of the display board to the positive and negative ends of the battery under test, press the button with your finger, and the LED light will light up to display the real-time battery power. Release your finger, and the LED light will be off for 3-10 seconds. No power consumption at static state. With reverse connection function, even if the positive and negative connection will not burn. Package Includes: 1x Power Display Panel note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.