A carrying device most specifically for carrying a pizza box in a level position when placed on a car seat which slopes downwardly from the front edge of the car seat toward the back rest. An adapter has a tapered signal pin and a tapered ground sleeve to maintain a consistent impedance and minimize reflections while connecting two elements having different dimensions. The keypad assembly has a thin configuration due to a combination configuration of the light shielding sheet and the key buttons. A dielectric support structure may be used in forming the antenna cavity.