Standard Hot Pack for Thermalator Heating Units Arm Sling Shoulder Immobilizer Stay Warm and Comfortable when MSHQ 84306 Stay Warm and Comfortable when Driving on Cold Days * Heats the back and seat * Instant heat * Multiple settings push button hand control with 3 settings (High Low Heat On Of) * Pressure activated shuts off automatically when not in use * Designed for the car 12 Volt adaptor plugs into your car lighter socket * Durability and Comfort woven fabric and high density foam for comfort and durability * Thin design thin profile design fits all vehicles * or Traditional Ophthalmoscope * Choose from Lithium Ion NiCad or C Cell handles * MacroView Identical to the hot packs that come in the TS4 *