This is a 4S 10A 4 Channel Battery equalizer used for a 12V battery pack. This device acts as a balancer/equalizer to balance the capacity of cells inside a 12V battery pack. This is not a Bluetooth balancer/equalizer. This can be used in lithium battery applications, this can be used in Lithium batteries of any type, including 18650 / 21700 / 32650 / 38120 / 66150 and any type of prismatic cells, etc. This can be used for 3S and 4S battery pack configurations. Dimensions 4.7 × 1.5 × 1.5 in.
Weight - 14oz also comes with User manual
 
Our balancer is made using only the highest quality materials and features advanced circuitry that is capable of accurately detecting and balancing the voltage of each cell in your battery. With its compact and lightweight design, it's easy to install and can be used with any C-Max battery, regardless of its size or capacity.
 
Not only does our balancer help to extend the life of your battery, but it also helps to improve its overall performance. By ensuring that each cell is operating at the same voltage, it reduces the risk of overcharging or discharging, which can cause damage to your battery and even shorten its lifespan.
 
So if you want to get the most out of your C-Max battery, invest in this high-quality battery balancer now!