Wearable electronic system consisting of a MASTER bracelet (Fig. 1) and a SLAVE bracelet (Fig. 3), said bracelets having circular shape and made with non-toxic material, wherein the MASTER bracelet has at least one transparent or light permeable section to make the underlying LEDs visible (Fig.1 - 32), provided with a push-button clasp fastener that finishes with a USB and/or microUSB connector (Fig.1 - 33); wherein the MASTER bracelet comprises a LED array arranged along the bracelet with intermediate connections to the array itself, provided with a capacitive touch screen display with LED and/or with flexible OLED technology to interact and scroll the menu items (Fig.1 - 31), and one or more multi-purpose push buttons (Fig.1 - 34); wherein the MASTER bracelet architecture is based on an Advanced RISC Machine microprocessor or SoftwarePC reconfigurable processor (Fig. 7 - 81) and firmware architecture, flexible and reconfigurable in real time, and equipped with internal hardware layout (Fig. 6 - 33, 36, 37) based on the RFID/NFC physical layer; wherein the SLAVE bracelet is provided with a USB and/or microUSB connector suited to charging internal batteries (Fig. 3 - 41), LED (Fig. 3 - 43) and buttons (Fig. 3 - 42) to enable transmission of power via inductive coupling to the MASTER bracelet (Fig. 1); wherein the SLAVE bracelet is equipped with hardware architecture (Fig. 8) based on microprocessor logic (Fig. 8 - 53), one or more internal lithium-ion rechargeable batteries (Fig. 8 - 56), battery charging circuit (Fig. 8 - 53), USB port (Fig. 8 - 52) and a physical layer designed for inductive coupling to the MASTER bracelet (Fig. 1); wherein the inductive coupling is allowed by an antenna (Fig. 8 - 57), an impedance matching circuit (Fig. 8 - 55), a power driver with an oscillator (Fig. 8 - 54) calibrated to the RFID/NFC frequency; the wearable electronic system being configured so that: • when the MASTER and the SLAVE bracelets (Fig 3) are in contact each other, a RPM command (Fig7 - 94) from the MASTER inhibits RFID/NFC data transmission (Fig. 6 - 32) and enables only energy transfer (Fig. 6 - 35) via inductive coupling from the SLAVE bracelet (Fig. 6 - 34) (Fig.4 - 14, 15, 16, 17, 18), in order to charge its battery/internal batteries (Fig 6 - 38) (Fig. 4 - 19) by the same RFID/NFC physical layer of MASTER Bracelet (Fig 6 - 30); and the SLAVE bracelet sends on the RFID/NFC antenna a periodic signal generated from internal oscillator (Fig8 - 54); • when the MASTER and SLAVE bracelets are not in contact with each other, the RPM command of the MASTER bracelet (Fig7 - 94) (Fig 6 - 32) restores the data transfer from RFID/NFC interface when in connection with a standard RFID/NFC device (Fig6 - 31) and inhibits energy transfer to the internal battery (Fig6 - 38). • when the MASTER and the SLAVE bracelets (Fig 3) are in contact each other, a RPM command (Fig7 - 94) from the MASTER inhibits RFID/NFC data transmission (Fig. 6 - 32) and enables only energy transfer (Fig. 6 - 35) via inductive coupling from the SLAVE bracelet (Fig. 6 - 34) (Fig.4 - 14, 15, 16, 17, 18), in order to charge its battery/internal batteries (Fig 6 - 38) (Fig. 4 - 19) by the same RFID/NFC physical layer of MASTER Bracelet (Fig 6 - 30); and the SLAVE bracelet sends on the RFID/NFC antenna a periodic signal generated from internal oscillator (Fig8 - 54); • when the MASTER and SLAVE bracelets are not in contact with each other, the RPM command of the MASTER bracelet (Fig7 - 94) (Fig 6 - 32) restores the data transfer from RFID/NFC interface when in connection with a standard RFID/NFC device (Fig6 - 31) and inhibits energy transfer to the internal battery (Fig6 - 38).