... 3.one year guaranteed 4.Original product 5.3 ATM waterproof Battery Changeable battery, long time use watch.can be used ... for 12 months, and 24 months on Waterproof 3 ATMBand Materialenvironmental silicone material,100% high quality,Eco-friendly ... , Time, Minute) M button is to adjust the function. 3ATM waterproof bracelet watch negative ion bracelet watches