The GMA-S140 series is a resized, smaller version of the G-SHOCK GA-140, which is based on the designs of stereo components and portable music players from the 1990s. For this model, the dials feature exciting hues that give them a pop image.

Specifications:
- Case / bezel material: Resin
- Resin Band
- Magnetic Resistant
- Shock Resistant
- Mineral Glass
- 200-meter water resistance
- LED light
- Auto light switch, selectable illumination duration (1.5 seconds or 3 seconds), afterglow
- World time
- 29 time zones (48 cities + coordinated universal time), daylight saving on/off, Home city/World time city swapping
- 1/1000-second stopwatch
- Measuring capacity: 99:59'59.999''
- Measuring modes: Elapsed time, lap time, split time
- Others: Speed (0 to 1998 units/hour), Distance input (0.0 to 99.9)
- Mach indicator (speed exceeding 1225 units/hour)
- Countdown timer
- Measuring unit: 1 second
- Countdown range: 24 hours
- Countdown start time setting range: 1 minute to 24 hours (1-minute increments and 1-hour increments)
- Other: Auto-repeat
- 5 daily alarms (with 1 snooze alarm)
- Hourly time signal
- Full auto-calendar (to year 2099)
- 12/24-hour format
- Regular timekeeping
- Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (speed)
- Digital: Hour, minute, second, pm, month, date, day
- Accuracy: ±15 seconds per month
- Approx. battery life: 2 years on CR1220
- Size of case: 49×45.9×15.8mm
- Total weight: 56g