A semiconductor package with improved redistribution layer design and fabricating method thereof are disclosed and may include a semiconductor die comprising bond pads, a first redistribution layer formed on the semiconductor die. The method includes transmitting a signal, to be received by the network node. Accordingly, it can be properly recognized whether the portable device is located inside the vehicle compartment or outside the vehicle compartment even if the transmitter to transmit the request signal in the vehicle compartment is disposed off the center line of the vehicle compartment in the vehicle width direction. In cases where the sum of feedable electric power is smaller than the sum of required electric power or in cases where an electric quantity related to the sum of feedable electric power is smaller than an electric quantity related to the sum of required electric power, a control portion increases the sum of feedable electric power or decreases the sum of required electric power. The order may contain a block in order to prevent it from being further processed until the completion of the auction checkout process by the winning bidder. The wristband is constructed so as to be waterproof, and includes an adhesive strip with small tear strips for fastening around the user’s wrist.