・ This is a neck cooler with a cooling plate. ・ Continuous usage time: Approximately 2.5-11 hours (fan only), approximately 1 hour auto-off (when using the cooling plate) ・ Purchased in July 2025 for help in the fields, it has no noticeable scratches, but there is a slight stain. ・ According to the instruction manual, the lithium battery's charging limit is 300 times, and it has been charged a total of 9 times this summer. ・ Please be aware that you should charge it once every three months even if you are not using it. ・ The instruction manual has been lost, so please refer to it here: https://www.elaice.jp/wp-content/uploads/2025/01/iFan_Collar_ice.pdf