Citizen Eco-Drive® watches are sustainably powered by light, no batteries required. Converting any kind of light into energy to power a watch, Eco-Drive enables the surplus to be stored on a power cell. On a full charge, an Eco-Drive watch runs for months even in darkness. It’s designed to charge from ordinary everyday light sources so you can go about your everyday life confident your watch will never stop.
How it works: Mechanical movement with a self-winding design. An automatic watch harnesses the energy produced by motion to wind the spring. This movement features a rotor that spins when the watch is in motion. The mechanism transfers energy from the spinning rotor to the main spring of the winding system.
Power reserve: The watch will maintain its power reserve if you wear it every day.
A wearable computing device worn on a user's wrist that offers functionality and capabilities similar to those of a smartphone. Smartwatches are designed to, either on their own or when paired with a smartphone, provide features like connecting to the internet, running mobile apps, making calls, messaging via text or video, checking caller ID, accessing stock and weather updates, providing fitness monitoring capabilities, offering GPS coordinates and location directions, and more. Explore our smart watch buying guide for a closer look at the latest innovations and to find the perfect smartwatch that fits your needs and style.
A European equivalent of the international measurement ATM or "atmospheres" used to measure water-test depth. To calculate the water-tested depth in meters, multiply the BAR number by 10 (10 BAR = 100 meters water resistant).
Applied to the cases and bracelets of select watches. The Physical Vapor Deposition (PVD) process creates lustrous satin and/or polished finishes in yellow, rose, black, gray, blue or a number of other fashionable colors.
Bluetooth watches can connect with other devices and access a range of services from the watch itself. Can include call and text message alerts, phone finder, music, time, and time zone updates.
Will tolerate splashes of water or rain, but should not be worn while bathing, showering, washing dishes, swimming, or diving. Watches will have the words Water Resistant engraved on the caseback.
(5 BAR) Okay for showering, bathing, dish washing, and swimming in shallow water. Not recommended for snorkeling or scuba diving. The designation engraved on the caseback will be Water Resistant 5 BAR.
(20 BAR) Can be worn for general water sports, including snorkeling and skin diving (without scuba gear). The caseback designation is Water Resistant 20 BAR. Note: Some dive watches will go further than 200M.
The most durable and commonly used watch case material, stainless steel is highly resistant to rusting, scratching and corrosion. Comes in silvertone and goldtone finishes and is often labeled "stainless."
The most common type of protective glass is made of silicon, boron, calcium or manganese oxides. Advantages include excellent clarity, hardness, scratch resistance and pressure resistance.
This highly scratch-resistant crystal is created through the fusion of sapphire and mineral glass crystals. Virtually impervious to scratches and cracks, it can be cut thinner than any other watch flass.
Made of a synthetic resin, the advantages of acrylic include good clarity, shock resistance, pressure resistance and easy cleaning. Also, minor scratches can be buffed out of the crystal.