Abstract: An electronic device including a bracket and an antenna is provided. The bracket includes first, second, third, and fourth surfaces. The antenna includes a radiator. The radiator includes first, second, third, and fourth portions. The first portion is located on the first surface and includes connected first and second sections. The second portion is located on the second surface and includes third, fourth, fifth, and sixth sections. The third section, the fourth section, and the fifth sections are bent and connected to form a U shape. The third portion is located on the third surface and is connected to the second section and the fourth section. The fourth portion is located on the fourth surface and is connected to the fifth section, the sixth section, and the third portion. The radiator is adapted to resonate at a low frequency band and a first high frequency band.

Abstract: A heating device for an article specially worn in the water activities includes a magnetic unit, a power source unit, an inductive unit, a control unit, a heating unit, and a display unit. In this device, the magnetic unit is to generate a magnetic output. The power source unit is to provide a power source needed by the device. The inductive unit, induced by the magnetic force of the magnetic unit, generates an inductive signal output. The control unit, electrically connected to the power source unit and the inductive unit, generates a control signal output by receiving an inductive signal output from the inductive unit. The heating unit is electrically connected to the control unit and is driven by the control signal output from the control unit to process a heating procedure.

Abstract: A heating device for an article specially worn in the water activities includes a magnetic unit, a power source unit, an inductive unit, a control unit, a heating unit, and a display unit. In this device, the magnetic unit is to generate a magnetic output. The power source unit is to provide a power source needed by the device. The inductive unit, induced by the magnetic force of the magnetic unit, generates an inductive signal output. The control unit, electrically connected to the power source unit and the inductive unit, generates a control signal output by receiving an inductive signal output from the inductive unit. The heating unit is electrically connected to the control unit and is driven by the control signal output from the control unit to process a heating procedure.