CHEERSON iMAX B6AC Version 2 Digital LiPo LiIon Life NiMH NiCd 2S 3S 4S 5S 6S RC Battery Balance Charger and Discharger with DC PC USB Port Temperature Port IMax B6AC V2 Charger with anti-fake holographic serial number on the back of the charger. This number can be inputted into the official website to prove its authenticity LITHIUM BATTERY METER:Plug your LiPo LiIon LiFe balance plug into the charger and use the battery meter as a voltage tester to quickly see the voltage readings from each cell INTERNAL RESISTANCE METER:Use this function to measure the resistance in each of your lithium battery's cells. This helps determine the health of your cells, to be sure you are getting the most power out of them B6AC can monitor and balance each cell of the battery individually PC CONNECTIVITY & UPGRADABLE FIRMWARE:Control your charger and update it with new firmware via the built in USB port. The software (PC Only) can be downloaded from the official website for free