The Citizen Eco-Drive Chronograph CA4505-21X watch wins its owners primarily by its universal appearance and relatively high durability. Of course, the Eco-Drive is the only one that provides power using light energy, eliminating the need to replace the battery. The Citizen Eco-Drive Chronograph CA4505-21X watch wins its owners primarily by its universal appearance and relatively high durability. Of course, the Eco-Drive is the only one that provides power using light energy, eliminating the need to replace the battery. The Citizen CA4505-21X watch has a case made of stainless steel with PDV treatment and it stays on the hand thanks to the leather strap. This case houses the in-house Citizen B620 movement, which has a light rechargeable battery with a power reserve of up to 9 months and also has a low battery indicator function. Its other features include a stopwatch, a twenty-four hour sub-dial and a date display at the 4-5 o'clock position. An interesting feature of the stopwatch is the smooth operation of the second hand, which allows the time to be measured with an accuracy of 1/5th of a second. The measurement works on the basis of the speed of sound. The clear dial is protected by a mineral glass. Readability in the dark is ensured by the full-luminescent dial and luminescent hands. The water resistance of the watch is 100m, so it can easily withstand activities such as swimming or minor immersion. Reviews and testing: A watch for everyone? Citizen.