For safety delivery, battery will be taken out before shipping, so you need to buy below extra battery from your local store.
Battery size like this in the picture
Material: chain is made of metal, please keep away from water.
Watch diameter: 4cm/1.57"
Chain length: 13.5cm/5.31"
Shipping: Free Shipping Worldwide for order over 15$, 7-15 days delivery to US/UK/CA/AU/FR/DE/IT and most Asia Countries