A wearable electronic device, comprising: a sensor module including a transmitter , a first receiver , and a second receiver ; a processor operatively connected with the sensor module , wherein the processor is configured to output out of the wearable electronic device a first signal of one type from a group comprising at least light and ultrasound using the transmitter, receive a reference part of the first signal using the first receiver, receive a second signal using the second receiver, wherein the second signal is another part of the first signal reflected by a part of a user's body after a tissue-signal interaction within the part of the user's body, identify the user's biometric information based on, at least, first data and second data, wherein the first data is based on the first signal and the second data is based on the second signal; a display , a structure provided at an upper portion of at least the transmitter and the second receiver and configured to redirect the other part of the first signal to the user, and to redirect the second signal reflected from the user to the second receiver; and wherein the sensor module further includes a first area and a second area spatially separated by a rib included in a housing of the sensor module, wherein the rib is lower in height than the housing, and wherein the transmitter is disposed in the first area, and the first receiver and the second receiver are disposed in the second area, and wherein the sensor module further includes a guide, wherein the guide is configured to extend between the first area and the second area over the rib , wherein a portion of the guide is in contact with any one of the first receiver and the second receiver , to allow the first receiver to receive the reference part of the first signal from the transmitter, wherein the display is configured to present the biometric information to the user . a sensor module including a transmitter , a first receiver , and a second receiver ; a processor operatively connected with the sensor module , wherein the processor is configured to output out of the wearable electronic device a first signal of one type from a group comprising at least light and ultrasound using the transmitter, receive a reference part of the first signal using the first receiver, receive a second signal using the second receiver, wherein the second signal is another part of the first signal reflected by a part of a user's body after a tissue-signal interaction within the part of the user's body, identify the user's biometric information based on, at least, first data and second data, wherein the first data is based on the first signal and the second data is based on the second signal; a display , a structure provided at an upper portion of at least the transmitter and the second receiver and configured to redirect the other part of the first signal to the user, and to redirect the second signal reflected from the user to the second receiver; and wherein the sensor module further includes a first area and a second area spatially separated by a rib included in a housing of the sensor module, wherein the rib is lower in height than the housing, and wherein the transmitter is disposed in the first area, and the first receiver and the second receiver are disposed in the second area, and wherein the sensor module further includes a guide, wherein the guide is configured to extend between the first area and the second area over the rib , wherein a portion of the guide is in contact with any one of the first receiver and the second receiver , to allow the first receiver to receive the reference part of the first signal from the transmitter, wherein the display is configured to present the biometric information to the user . <EOS>