G-STEEL urban sophistication inspired by urban nights and city lights, in a tough G-SHOCK dressed in refined structural beauty, the black ion-plated GST-B1000BD. Changing from moment to moment as light shifts across its surface, the logo-less bezel takes on a depth and luster only black ion plating can achieve. Stainless steel in minimalist black-toned styling and streamlined form a refined, lustrous impression. 
The combination of hairline and mirror finishes lends a quiet, yet solid sense of presence to the stainless-steel band, with a refined tri-fold clasp that ensures an even more secure hold. The uncompromisingly bold design goes all-black, with black ion plating applied to the smallest components, including the case back, side buttons, crown, tri-fold clasp, and even screws. 
The bezel design and brick pattern inherited from the very first G-SHOCK add a sporty style to the minimalist look. Adhesive glass bonding and a compact module result in a slimmer, lighter design without sacrificing the shock-resistant construction, thanks to the metal bezel that guards against impact and the carbon-reinforced resin case that protects the module. All of this comes together in an exacting combination of comfort, toughness, and everyday practicality. The all-black metal body naturally gleams in a wide range of settings, from business to casual to outdoors. Elevating tough construction and refined structural beauty to a whole new level, the GST-B1000BD is an all-around companion ready for whatever comes your way.

Case / bezel material: Bio-based Carbon / Stainless steel
Black ion plated bezel
Black ion plated band
Solid stainless steel band
One-touch 3-fold Clasp
Shock Resistant 
Neobrite
Carbon Core Guard structure
Mineral Glass
Screw Lock Crown
200-meter water resistance
Tough Solar (Solar powered)
LED light (Super Illuminator)
Afterglow
LED:White
Mobile link (Wireless linking using Bluetooth®) 
Time adjustment
Bluetooth: Connects to a smartphone and automatically adjusts the time
1-second stopwatch
Measuring capacity: 29'59 (30 minutes) 
Measuring mode: Elapsed time
Countdown timer
Measuring unit: 1 second
Countdown range: 30 minutes
Countdown start time setting range: 1 second to 30 minutes (1-minute increments)
Daily alarm
Low battery alert
Full auto-calendar (to year 2099) 
Power Saving (hands stop to save power when the watch is left in the dark)
Day indicator
Date display
Regular timekeeping:
Analog: 3 hands (hour, minute (hand moves every 10 seconds), second), 2 dials (24-hour, day)
Accuracy: ±15 seconds per month (with no mobile link function)
Approx. battery operating time:
5 months on rechargeable battery (operation period with normal use without exposure to light after charge)
18 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)
Size of case : 46.9 × 44.2 × 11.6 mm
Total weight : 118 g