This is a battery used in smartwatches such as the Louis Vuitton Tambour Horizon V1. A toolkit is also included. This item is only available through overseas import. It is new and unused, but since it was obtained from overseas, the quality cannot be guaranteed. For reference, items purchased at the same time and used by the seller did not have any problems. - Model: APPack APP00207 - Capacity: 300mAh - Voltage: 3.8Vdc - Max Charge Voltage: 4.35Vdc - Lithium-ion Battery: Li-ion Search terms: Louis Vuitton Tambour Horizon