Citizen Eco-Drive Promaster SST Quartz Mens Watch, Stainless Steel with Leather strap, Blue (Model: JW0139-05L)

Eco-Drive | Purposeful Power

The sustainable way to power your watch—no batteries required. Citizen’s proprietary Eco-Drive technology powers your watch using the most renewable energy: light.

Light to Energy

Uses a renewable natural resource by converting any natural or artificial light to energy, which is then stored in a permanently rechargeable lithium-ion cell.

Energy Storage

Keeps surplus energy in a rechargeable power cell. Designed to charge not just from the sun, but also from everyday light sources like indoor fluorescents and desk lamps.

Recharges Continuously

Runs for months—even in darkness—with no need for regular battery replacement, so your watch can run forever and you never have to worry about it stopping.

World Time in 43 Cities (31 Time Zones)

1/1000 Second Chronograph Measures up to 24 hours

Average Speed Calculation, Split Lap Time & 20 Lap Memory

Anti-Reflective Sapphire Crystal & 200M Water Resistance