The SkyRC LiPoPal is a simple to use battery checker and self voltage balancer. When you are out in the field flying it's not easy to figure out the remaining capacity of your battery. With the LipoPal you can check the voltage of each cell and the remaining capacity quickly and easily. In addition, when it detects the battery isn't balanced, it will balance the battery for you. The LipoPal is a great addition to any flyer's field kit. Features: Easy to use Displays cell voltage and battery capacity Balances batteries for long term use Includes: SkyRC LipoPal Battery and Balancer Wrist strap FlightPower/Thunder Power Adapter (SK-500007)