Curve Display D+D1 voltge curve can show the recharging protocols changes in real time; provides the high-speed power ripple measurement curve of chargers. Any abnormal charging status could be found immediatelyBlutooth function for ANDROIDFor andorid smartphone users, there is an app to download. And open the bluetooth function you could synchronize the date to your smarthone and the computer. And there will be an overvolatge and overcurrent alarm in the app.