【Product Overview】 Sony REON POCKET 4 Wearable Thermo Device Kit Released April 2023 I purchased this used item on Mercari in the summer of 2023 and used it 7-8 times. Please understand that this is a used item. I will disinfect it before shipping, but please disinfect it again upon receipt. (Contents) SMART COOL⇔WARM MODE automatically adjusts and switches temperatures via the app. REON POCKET is a wearable thermo device that can directly cool or warm the surface of the body where it makes contact. It supports both cooling and heating, so it can be used in both "summer" and "winter." By linking REON POCKET 4 with the included TAG, the built-in sensors detect the ambient temperature and humidity, and automatically adjust the REON POCKET unit to the appropriate temperature. Furthermore, it is equipped with a new feature, SMART COOL⇔WARM MODE, which automatically switches between COOL (cooling) and WARM (heating). For example, during the changing seasons with large temperature differences, or on days with a mix of cold and heat, it automatically adjusts the temperature to match the environmental changes.