Disclosed is an electrolyte for electrochromic devices, which includes a eutectic mixture comprising: a compound having an acidic functional group and basic functional group; and an ionizable lithium salt. In a first aspect of the present invention, a first software bridge determines the proper working operation of a physical adapter. At least a portion of the third part is made thinner than the first and second parts. A reflective layer is not provided between the first adhesive layer and the first bonding layer.