This tiny unit packs a powerful punch! It's able to quickly check the power levels of your battery. Designed for 1S-8S (5-30V) Li-ion, LiPo, Lithium or Lead Acid batteries. With its tiny footprint you can carry it in your pocket or in your toolbox without taking up much room at all. Program it for your battery type and voltage in under a minute. Complete, detailed instructions included in each package in both English and Spanish.