Brand from South Korea: Medicube. Battery: 11.1V / 1,400mAh rechargeable. Guided and Safe Use: Follow our user manual for techniques to optimize benefits. Consult with a healthcare professional before use, especially if you have sensitive skin, recent treatments, or ongoing medical care. This prevents adverse reactions and ensures the best results. Warranty Period and Details: This product (medicube - AGE-R Ultra Tune 40.68) is covered by a warranty that expires 12 months from its shipment date. During the warranty period, customers will be entitled to free replacement service if the defective item is caused by non-human factors and is within the scope of a warranty. No replacement for defective items after the warranty period. Within Scope of Warranty: Limited to malfunctions occurred during normal use. Out of Scope of Warranty: For malfunction or damage resulting from human factors listed below: Any improper use and damage caused by accident or improper storage of the device (e.g. device dropped), any us