Casio International Model G-Shock GA-B2100-1A Men's Watch,

Specifications and Functions Case and bezel material Carbon/resin Band Resin band Structure Shock resistant (Shock Resistant) Carbon Core Guard Structure Water Resistance 200m water resistance Power source and battery life Tough Solar Mobile link function app Compatible with CASIO WATCHES App linkage function Automatic time adjustment Easy clock setting World time for approximately 300 cities Stopwatch Timer Timer Alarm/Hourly time signal 5 daily alarms and hourly time signal Light Double LED light: LED light for dial, LED backlight for LCD Light color LED: White Calendar Full auto-calendar Operation sound ON/OFF switch function Operation sound ON/OFF switch function Power saving function Power saving function Operating time Operating time from full charge without solar power generation When using functions: Approximately 7 months When in power saving mode: Approximately 18 months Accuracy *When not linked to a smartphone, the watch will operate with normal quartz accuracy, with an average monthly deviation of ±15 seconds. Other features: Hand retraction function, 12/24 hour display switching, Date display, Size and weight: Case size: 48.5 x 45.4 x 11.9 mm, Weight: 52 g Supported band sizes: 145-215mm While retaining the octagonal form of the GA-2100, which inherited the design concept of the original G-SHOCK, this model is equipped with Smartphone Link and Tough Solar. To accommodate the increasing number of components that comes with increased functionality, a new thin module with optimized circuit board layout has been developed. Combined with the carbon core guard structure, the watch maintains the same size as the previous model. This all-black model features a minimalist color scheme.