A liquid crystal composition comprising a liquid crystal compound, a gelling agent comprising a hydrogen-bonded compound with polymerizable double bonds at both ends to form a gelatinizable mixture with the liquid crystal compound, and a photoinitiator causing a polymerization reaction of the hydrogen-bonded compound of the gelling agent is disclosed. The method includes using the ionic current for determining the transmission state of the electrochromic device. The RFID circuit and the conductive loop are electrically coupled to form a series circuit, severance of which disables the wristband. When the core is rotated in a first direction about the shaft, a circumference of the coiled outer surface of the torsion spring increases thereby restricting a rotation of the core in the first direction.