This is a 12V lithium-ion battery set for air-conditioned "Kucho Fushin" workwear. It features a high voltage of MAX 12V and is made in Japan, certified with the high-quality S mark, ensuring peace of mind and safety. It provides approximately 4.5 hours of use on high, 9 hours on medium, and 22 hours on low. It's Bluetooth compatible, allowing for easy operation (ON/OFF, fan speed adjustment) via an app. It also has a built-in USB port for charging smartphones. 【Product Name】12V Lithium-ion Battery Set 【Model】Rechargeable Lithium-ion Battery 【Dimensions】104mm x 77mm x 29mm (excluding soft case) 【Capacity】3360mAh 48.38Wh 【Output】High: 12V, Medium: 9V, Low: 6V, USB: 5V 【Weight】Approx. 300g (excluding soft case) 【Charging Time】Approx. 4 hours 【Set Contents】Battery Body Please refrain from purchasing if you are sensitive to items stored at home. Thank you.