The Nighttime Drive series is designed with the image of a night drive scene in mind. - The ECB-2000YNP has a deep blue color at the top and a gold gradation at the bottom. - The ECB-40YNP also has a gradation from deep blue in the upper half to silver at the bottom. - This represents the night sky and the lights of the highway below. - ECB-2000YNP is equipped with smartphone link and tough solar ECB-40YNP is equipped with smartphone link - It connects to a smartphone app via Bluetooth and enables features such as automatic time adjustment for accurate time display world time with easy selection of approximately 300 cities 1/1000-second stopwatch measurement data transfer to the smartphone and a phone finder function that rings the smartphone when the watch button is pressed and held. ・ Tough Solar (solar charging system) - 10 ATM water resistance - Mobile Link function (function linkage via Bluetooth communication with compatible mobile phones) - Needle retraction function (When the needle overlaps with the LCD display and is difficult to see the needle can be temporarily retracted from above the LCD display) World time: 38 cities (38 time zones daylight saving time automatic setting function) + UTC (Coordinated Universal Time) Home city swap function Stopwatch (1/100 seconds (less than 1 hour) / 1 second (more than 1 hour) 24 hour counter lap / split) - Timer (set unit: 1 second maximum set: 60 minutes measured in 1 second units with warning sound) 5 time alarms (with warning sounds) Time signal Battery indicator Power saving function (display turns off after a certain period of time in the dark to save power) Fully automatic calendar 12/24 hour display switching operation sound ON/OFF switching function countdown timer warning sound ON/OFF switching function day of the week display (6 languages switching: English Spanish French German Italian Russian) Double LED light: LED light for dial (Super Illuminator afterglow function afterglow time switch (1.5 seconds/3 seconds)) LED backlight for LCD (Super Illuminator afterglow function afterglow time switch (1.5 seconds/3 seconds))・ Operating time from full charge without solar power generation When using functions: Approximately 7 months When in power saving mode: Approximately 18 months * When not linked to a smartphone it operates with normal quartz accuracy (average monthly difference of ±15 seconds)Model Number: ECB-2000YNP-1AJF