Sony REON POCKET 4 (RNP-4) Application connection operation confirmed. If you are interested, please leave a comment. ★Included Items★ Main unit, neckband, air flow parts, USB cable, case REON POCKET is a wearable thermo device that can directly cool or warm the surface of the body where the main unit makes contact. It supports both cooling and heating, so you can use it in "summer" and "winter". Please understand that this is a used item before purchasing.