DEWALT DCB203BT-2 20V MAX Compact Battery with Bluetooth 2 Pack

Works with ToolConnect app to provide additional controls, alerts, and inventory management

Requires smartphone with Bluetooth 4.0 on either iOS or Andriod phone

Functions include alert when out of bluetooth range and the ability to enable and disable the battery pack

Download Toolconnect app for free at the App Store or Google Play for more info