This is a battery used in smartwatches such as the Louis Vuitton Tambour Horizon V1. It is only available through overseas import. Although it is new and unused, we cannot guarantee the quality as it is obtained from overseas. For reference, the items purchased at the same time, I have used them myself without any problems. There is stock available, so if you are interested in purchasing two, we can offer a discount. Please feel free to comment. - Model: APPack APP00207 - Capacity: 300mAh - Voltage: 3.8Vdc - Max Charge Voltage: 4.35Vdc - Lithium-ion Battery: Li-ion Search terms Louis Vuitton Tambour Horizon Louis Vuitton Tambour Horizon