The invention relates to an electronic pressure gauge for measuring the pressure (P) inside a container, particularly a pressurised gas cylinder, said pressure gauge (1) including: at least one pressure sensor (14); an electronic unit (44) designed to acquire, store and process data; and at least one information device (34) capable of transmitting at least one item of information (P). The pressure gauge also includes a first radio (34) with a reception port, said first radio (34) being connected to the electronic unit (44) so as to receive external data (D) in order to modify the operation or the configuration of the pressure gauge (1). The reception port of the first radio (34) is designed to read data modulated in terms of the frequency and/or intensity of an external magnetic field at a first low frequency, for example a frequency between 50 and 300 KHz. The first radio includes a first radio transmission port connected to the electronic unit (44) in order to transmit information (P) from the pressure gauge (1). The first transmission port and the reception port of the first radio (34) have a substantially identical transmission and reception operating frequency. The invention is characterised in that it includes a second radio (340) having only a transmission port, said second radio (340) being connected to the electronic unit (44) for the wireless transmission of information (P), in particular information relating to the operation of the pressure gauge (1). The transmission port of the second radio (340) is designed to transmit data by modulation of frequency and/or intensity of a magnetic field at a second high frequency, above the first frequency of the first radio (34), for example between 300 KHz and 800 MHz.