The Citizen CB5890-51L is a Sport Luxury Eco-Drive watch featuring a blue sunray dial in a 43mm stainless steel case paired with a matching stainless steel bracelet. Powered by Citizen's renowned Eco-Drive technology, this watch converts any light source—natural or artificial—into energy, eliminating the need for traditional battery replacements. The movement is Citizen's Caliber E660.

This watch includes Perpetual Calendar Atomic Timekeeping (PCAT) with multi-band radio signal reception, automatically synchronizing to atomic clock signals for precision accuracy. Additional features include world time display across 24 time zones, a 1/5-second chronograph accurate to 60 minutes, alarm function, day/date display, and a power reserve indicator. The blue dial is accented with luminescent hands and hour markers for visibility in low light conditions. A scratch-resistant anti-reflective sapphire crystal protects the dial. The stainless steel bracelet is secured with a fold-over clasp with push-button release, and the watch carries a water resistance rating of 200 meters.