A display device where the power consumption of a display panel can be reduced by controlling a display time rate. One aspect of the design includes generation of electricity via a turbine configured to be actuated by an increase in gas pressure from heat transfer fluid in a continuous heat transfer fluid system as it exits the evaporator. The inclusion of wheels and a handle on the stowage unit enable simple movement when disassembled and the inclusion of a locking door provides the ability to safely secure valuables within the internal cavity of the stowage unit. The service tool includes a secondary coil, enclosed within a housing, that provides at least 100 mA of inductively-generated alternating current, a rectifier, a linear voltage regulator, a battery charge controller and a battery. The main body wraps around the front leg of the wheelchair, over the foot rest brackets, and is secured by the straps. An EAS transmitter and an EAS system are also described.