GOLDEN HOURMens Waterproof Digital Sport Watches Wide Screen Easy Read Display Military Style with Rubber Strap

Q: how big is this watch?

Case diameter measurement is 44mm

Q: Does it have dual timezone?

It is digital watch it does not have hands to indicate time

Q: What is the battery life. You don't say in your add..???

My guess 6 or 7 years, perhaps longer, I buy these watches about every 4 or 5 years, never changed a battery in them. Overtime they get scratched up, ban breaks, cheaper to buy this watch again than change the ban. Definitely gets your money's worth out of the cheap watches.