Beach RC says... 

Spektrum™ Smart Technology is about offering a higher connection to your hobby. It's an RC ecosystem that puts you in complete control while making vital components of your model easier to use than ever before. Smart technology ensures that all of your model's electronics work together seamlessly for the greatest efficiency and performance. It keeps you aware of every component's status, boosts your confidence in its capabilities, and makes your entire system more responsive and simple to use.

Spektrum radios with Smart features can download firmware updates instantly using Wi-Fi and can swap setups with compatible radios via Bluetooth. Spektrum Smart LiPo batteries have a built-in microchip that records and communicates your charging preferences automatically to Smart chargers — just connect your pack and press "Start." Smart IC™ series connectors include an innovative data wire that transfers information easily between Smart components with a single connection. Finally, Smart ESCs not only deliver power but also eliminate the hassles from running telemetry. The days of installing and connecting multiple wires, sensors, modules and links are over.