The Casio G-SHOCK GA400GB-1A9 combines oversized streetwear styling with bold black and gold detailing for a powerful everyday sports watch. Featuring a large layered analogue-digital display with metallic gold accents against a matte black resin finish, this model delivers standout wrist presence while maintaining the rugged durability G-SHOCK is known for.

With a case size of 55 × 51.9 × 18.3 mm, the GA400GB-1A9 offers a bold oversized fit designed for strong readability and sporty styling. The large front rotary switch positioned at the 3 o’clock side of the case gives the watch its distinctive appearance while allowing quick and intuitive function operation.

The black and gold colour combination creates a premium streetwear-inspired aesthetic that pairs easily with casual outfits, sporty looks, and modern urban styling. The layered dial construction adds depth and texture across the face, combining analogue hands with digital displays for a bold industrial-inspired look. 

Built with G-SHOCK shock-resistant construction and 200-metre water resistance, the watch is designed for active lifestyles, travel, outdoor wear, and dependable everyday performance. The durable resin construction provides lightweight comfort while remaining strong enough to handle demanding daily use.

The analogue-digital display includes practical functionality such as World Time across 31 time zones, a 1/1000-second stopwatch, countdown timer, five daily alarms, hand shift function, and full auto-calendar functionality. An LED light improves readability in darker environments, while Neobrite hands provide quick visibility at a glance.

Combining oversized styling, bold black and gold finishes, and reliable G-SHOCK durability, the Casio G-SHOCK GA400GB-1A9 delivers standout everyday performance with strong streetwear appeal.