- Brand: THANKO - Product Name: NECK COOLER POCKET - Cooling Temperature: -14℃ - Weight: Approximately 180g - Size: Suitable size: 30-42cm * Charging Time: Approximately 4 hours (varies depending on the environment) * Modes: Strong Mode / Weak Mode / Fluctuation Mode * Usage Time... * Strong Mode: Approximately 1.5 hours * Weak Mode: Approximately 2.5 hours * Fluctuation Mode: Approximately 2 hours * When using the dedicated battery * Varies depending on the usage environment. * Cooling Plate Temperature Guide... * Strong Mode: -4 to -7℃ from the outside temperature * Weak Mode: -2 to -5℃ from the outside temperature * Measured at an ambient temperature of 35℃. * Temperature fluctuates depending on the usage environment. Thank you for viewing. I purchased it for 5,880 yen. I have only used it once, and it is in beautiful condition. There are no problems with the operation. Thank you.