QUESTIONS and ANSWERS *Q:How big of a wrist will this fit? A: Max size is9.05in, the min size is 7.87,I hope this is helpful to you. *Q:Does the warranty cover battery replacement? A:For the defective products, we can replace them for free. The natural consumption of batteries is not covered by the warranty. Generally, the battery of the new watch can be used for 1-3 years. Thanks ! *Q: It's not working when i set time at the first time, why? A: All the watches will be checked and keep good before shipped out.Don't worry this,you may need to Spin the watch-head several times.more questions, please contact us. *Q:Is the battery included? A:Battery is Included,also coming with a back-up battery. Specification Movement:Original Japan Time Module Quartz Dial diameter:36mm Case thickness:6.9mm Band width:18mm Waterproof Deepth:3 Bar Metal material:Stainless steel Net weight:29g Package List 1* Beautiful Watch box 2* Original Hannah Martin watch 3* Hannah Martin tag 4* Hannah Martin Instruction manual