Purchased this summer and used only once. A high-power smartphone cooler to prevent heat buildup during games and video recording. It uses a Peltier element and offers a maximum cooling power of -18°C while being lightweight, compact, and quiet. It also has a built-in safety device that automatically stops operation if the temperature becomes abnormally high. Retail Price: 5500 yen Cooling Method: Peltier element Cooling Capacity: Maximum approximately -18°C Noise Level: Approximately 22.6db Compatible Devices: Smartphones from 4.7 to 7.0 inches (approximately W65-85mm) Attachment Method: Clamping from top and bottom Safety Features: Abnormal temperature detection sensor (monitors the temperature of this product and automatically stops operation if the temperature becomes abnormally high for safe and reliable use.) Power Supply: USB (5V 2A or higher) *USB adapter not included. Rated Voltage: 5V Power Consumption: Approximately 10W Rotation Speed: Approximately 5800rpm Maximum Airflow: Approximately 4.8CFM Fan Rotation Diameter: Approximately 33mm External Dimensions: Approximately W42mm x D30mm x H78mm Weight: Approximately 48g (excluding cable) Includes only the main unit and cable. Please understand that this is a used item stored in a regular household.