How long is the battery life?<br> 2 years, and we will give extra batteries to extend the life of the watch <br>, so the battery can be used for 4 years.<br><br> Introduction<br> Classic business casual design. Both high quality, cutting edge fashion and value.<br> This style is bold and very beautiful and comfortable.<br> Features<br> * Water resistant to 99 feet and 30 meters.<br> * Carefully wrap the watch box<br> * 3 sub-dial calendar windows can be used normally.<br> * Soft silicone strap buckle has a wrist that fits your wrist<br> X 12 or 24-hour dial timing date display<br><br> specification<br> Strap material high quality silicone<br> Case material stainless steel<br> Case diameter 46 mm / 1.81 in<br> Case thickness 12.1 mm / 0.48 in<br> Strap width 24 MM / 0.94in<br> Strap length 246 mm / 9.69 in<br> Strap adjustable buckle<br> Weight about 100 g<br><br> * * Note * *<br> 1. Regularly clean the strap with soft fabric.<br> 2. Regular exposure to water can reduce the durability of your watch.<br> 3. Avoid temperatures that are extremely hot or cold.<br> 4. Please do not press any button underwater. Please wipe the watch after swimming.<br><br> packing list<br> Casual design men's watch × 1<br> Instruction manual × 1<br> Warranty card × 1<br> Watch box × 1<br> Extra battery*1<br>