Max or flex, 20/60v, lithium-ion battery charger & bluetooth radio, able to be powered by 20v/60v dewalt batteries as well as ac power cord, 3a charging of 20v/60v dewalt batteries when unit is plugged into ac power, bluetooth connectivity up to 100′, 2 additional ac power outlets, nfc wireless connectivity, audio visual remote control protocol allows you to control your device from the radio interface, allows you to keep the device in a safe place & skip to the next song or hit replay on the radio interface.