This is a peltier vest with a fan and mesh material, providing instant cooling. - Brand: BULONCHI - Product Name: Peltier Vest - Included: Instruction manual, battery - Features: With fan, mesh material - Cooling Function: Instant cooling Thank you for viewing. Used once for about 2 hours. ・Please purchase only if you understand that this is a used item. ※Shipping will be on weekends depending on the situation, so please be aware. ※Feel free to comment if you have any questions.