An electronic device for receiving a physiological signal of a user comprises a physiological signal receiving device and a computing device. The physiological signal receiving device comprises: a sensor, configured to receive the physiological signal of the user a first processor, coupled to the sensor, and configured to convert the physiological signal into a digital signal a first communication interface, configured to output the digital signal a battery and power management system and an ExpressCard connector, coupled to the first processor. The computing device comprises a second communication interface, configured to receive the digital signal and an ExpressCard socket.
