Abstract: A wearable device includes a case and a detection module. The case includes an inner casing and an outer casing. The inner casing includes a main body and a lateral wall. The main body is an annular structure. The lateral wall is disposed on a lateral side of the main body. The main body has a first installation area, a second installation area and a third installation area. The outer casing is disposed around the inner casing and abuts against the lateral wall, and the outer casing has a first opening. The detection module is disposed inside the case. The detection module includes an energy storage unit, an information transmission unit and an optical identification assembly. The energy storage unit is located on the first installation area. The information transmission unit is located on the second installation area. The optical identification assembly is located on the third installation area.

Abstract: A ring of detecting physiological information of a user includes a case and a detection assembly. The case has an inner space including an annular region and a sunken region. The sunken region has a first lateral side, a lower bottom and a second lateral side. The first lateral side and the second lateral side are located on two sides of the sunken region and respectively connected with two sides of the annular region. The annular region covers a back of the user's finger. The lower bottom of the sunken region contacts against a finger pulp of the user's finger. The first lateral side and the second lateral side respectively contact against lateral sides of the finger. The detection assembly is disposed inside the case and includes a first detection module and a second detection module respectively located on the first lateral side and the second lateral side.