The UnWired R1S-1109 is a new system specifically designed for the expanding mobile audio and video market. With the increasing popularity of Sport Utility Vehicles and Vans, more families are purchasing audio/video systems to entertain the children on long trips. Addressing the fact that wired headphones can create safety problems and break, the R1S-1109 system is specifically systems for automotive applications. The headphones require 2 AAA batteries per headset (not included), and 80 hours of listening time can be expected under normal use.