An electronic device with touch-link functionality (100, 200A, 200C, 200D, 300A), comprising: a touch panel (110, 210A, 210C, 210D), comprising a first transmitting electrode (21, 23, 25, 27) for transmitting a first signal; a signal processing circuit (120, 230A, 230C, 230D), providing the first signal to the first transmitting electrode (21, 23, 25, 27), wherein the first signal has a first frequency that is adjustable; and characterized by a controller (130, 240A, 240C, 240D), coupled to the touch panel and the signal processing circuit, adjusting the first frequency to make the first signal correspond to an effective communications range, wherein within the effective communications range, another electronic device with touch-link functionality (100, 200B, 200C, 200D, 300B) is able to receive the first signal, whereas outside the effective communications range, the other electronic device with touch-link functionality (100, 200B, 200C, 200D, 300B) is unable to receive the first signal, and wherein the controller (130, 240A, 240C, 240D) is configured to transmit a fifth signal at a plurality of different test frequencies in turn via the first transmitting electrode (21, 23, 25, 27) before the first transmitting electrode transmits the first signal; wherein the electronic device (100, 200A, 200C, 200D, 300A) is further configured to receive information regarding one or more preferred frequencies from the other electronic device (100, 200B, 200C, 200D, 300B) and to select at least one of the one or more preferred frequencies as the first frequency, wherein the one or more preferred frequencies are a selection from the plurality of different test frequencies. a touch panel (110, 210A, 210C, 210D), comprising a first transmitting electrode (21, 23, 25, 27) for transmitting a first signal; a signal processing circuit (120, 230A, 230C, 230D), providing the first signal to the first transmitting electrode (21, 23, 25, 27), wherein the first signal has a first frequency that is adjustable; and characterized by a controller (130, 240A, 240C, 240D), coupled to the touch panel and the signal processing circuit, adjusting the first frequency to make the first signal correspond to an effective communications range, wherein within the effective communications range, another electronic device with touch-link functionality (100, 200B, 200C, 200D, 300B) is able to receive the first signal, whereas outside the effective communications range, the other electronic device with touch-link functionality (100, 200B, 200C, 200D, 300B) is unable to receive the first signal, and wherein the controller (130, 240A, 240C, 240D) is configured to transmit a fifth signal at a plurality of different test frequencies in turn via the first transmitting electrode (21, 23, 25, 27) before the first transmitting electrode transmits the first signal; wherein the electronic device (100, 200A, 200C, 200D, 300A) is further configured to receive information regarding one or more preferred frequencies from the other electronic device (100, 200B, 200C, 200D, 300B) and to select at least one of the one or more preferred frequencies as the first frequency, wherein the one or more preferred frequencies are a selection from the plurality of different test frequencies.