Abstract: An electronic bracelet includes a rechargeable battery, a chip and a wireless charging module. The chip detects health information of a wearer of the electronic bracelet. The wireless charging module receives an alternating magnetic field and converts the alternating magnetic field to direct current to charge the rechargeable battery.

Abstract: A car multimedia device includes a positioning board, a display and a data transmitting chip. The data transmitting chip is near the positioning board and is coupled to the display. A docking bay is defined in the multimedia device for docking an electronic device. The positioning board is located on one side of the docking bay. When the electronic device is located in the docking bay, the electronic device is configured to lean against the positioning board for facilitating coupling to the data transmitting chip.