Citizen Promaster Sky Radio Controlled Titanium CB5850-80E

Citizen E660 clockwork
This watch is equipped with Citizen's advanced E660 clockwork. As a Eco-drive clockwork, it recharges by light and if Power Save is activated (deactivating the radio signal receiver and some other functions), it can keep running for approximately 3 years (if fully charged), without being charged. It has a built-in radio signal receiver that register and adjust to the information that it receives, to always have/present the correct time (in Europe, North America, China and Japan). Other cool functions: Perpetual calendar (automatically adjusting to leap years), alarm, analogue stop watch (chronograph), display of weekday and date, display of time in both 12 and 24 hour format plus world time (choose the closest city and the watch takes care of the rest).

Tachymeter
Used for calculating. For example, the time it takes a car to drive 1 km is converted to speed/time.

Safety mechanism
This watch has an extra safety mechanism, which prevents the lock from getting opened by accident.

Screw crown
Prevents penetration of water. To set the watch, the crown must first be screwed up.

Titanium bracelet
Stylish and lightweight - makes titanium bracelet extra special. This high quality material is resistant to corrosion and is very gentle to the skin (no nickel), so it could be used by people with nickel allergies.

Sapphire glass
Sapphire is up to 7 times harder than steel, and surpassed only by diamonds on the Mohs scale. This makes sapphire glass a great protection for your watch.

Quartz Watch
A battery-powered quartz watch is controlled by fluctuations in a crystal of the mineral quartz. These oscillations change very little over time, which is why quartz is often used - because it retains its accuracy.

Water protection: 200 meter (20 bar)
This watch can be worn while swimming/snorkeling (near the surface). The value refers to the pressure in water, at that depth, while motionless... and should not be seen as the depth for wearing the watch..

Condensation - important!
Rapid changes in temperature can cause condensation inside the watch. If you notice moisture beneath the glass, you should immediately go to a watchmaker, who can open and dry the watch. Even if the signs of moisture disappears, by themselves... the moisture will not - and will eventually damage your watch - so, visit a professional and remove it permanently. Even waterproof watches are not protected against condensation, so keep that in mind if you plan to go from very hot to very cold temperatures - like from a hot sauna directly to the snow. If condensation occurs, it very rarely (if ever) depends on manufacturing, so if your watch is damaged by moisture, warranty will probably not cover it (it could be manufacturing issues, but... most likely it will be because of the rapid change of temperature = natural causes).

Size
This watch has a width of 44 mm (the dial, measured from left to right, with the crown excluded).
Even if some watches are not perfectly circle-shaped, we still use the term: diameter - and we only measure the case, completely ignoring the crown (even though some include it, in their measurements).

Titanium case This watch is produced in titanium, which is characterized by being lighter than steel and free from nickel.

Sizes
Does this watch fit your wrist? Wristwatches has gradually become larger in size, and a typical men's watch is usually between 40 and 45 mm wide. If you have a wrist that is noticeable larger/smaller, we recommend that you focus on the sizes in/outside the outer edges of the typical sizes. You are always welcome to contact our support, so we can share our experience with you.

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