men's mechanical watch ai lang double fly wheel new automatic tiktok boom model waterproof, Slivery;brown

1.winding: the internal function of the new mechanical watch is almost zero, and it needs to be manually wound before wearing it for the first time 2.stainless steel wear: stainless steel is resistant to falling but not abrasion-resistant, so small wear marks are prone to appear 3.error:the error of the mechanical watch is within 24 hours and 30 seconds, which belongs to the normal error range 4.adjust the calendar: please do not actively adjust the calendar between 22.00~2.00, this may cause damage to the movement.syi