---
type: product
title: G-Shock GA-100-1A4ER Multifunction Watch
handle: g-shock-ga-100-1a4er-multifunction-wristwatch
url: >-
  https://www.hsjohnson.com/products/g-shock-ga-100-1a4er-multifunction-wristwatch
sku: GA-100-1A4ER
price: '7600.0'
currency: GBP
tags:
  - bestseller
  - in_stock
  - Mens
collections:
  - Watches
  - G-Shock
  - In Stock
  - All
  - Mens Watches
  - OrderlyEmails - Recommended Products
  - Bestsellers
variants:
  - title: Default Title
    price: '76.00'
    sku: GA-100-1A4ER
images:
  - >-
    https://cdn.shopify.com/s/files/1/0621/1164/5922/files/G-Shock_GA-100-1A4ER_Multifunction_Wristwatch_-_H_S_Johnson-2834468.jpg?v=1724890939
created_at: null
updated_at: null
metafields:
  global.title_tag: G-Shock GA-100-1A4ER Multifunction Wristwatch | HS Johnson
  global.tag-9-movement: Quartz
  global.tag-8-display-type: Analogue & Digital
  global.tag-12-water-rating: 200 m (20 ATM)
  global.tag-3-case-material: Resin
  global.tag-5-strap-type: Strap
  global.tag-18-pricing-rule: '05 - Beat all small: combined'
  global.tag-22-maximum-price: '15'
  global.mpn: GA-100-1A4ER
  global.tag-26-maximum-discount-code-p: '0'
---

Featuring 35mm dials and large cases, G-SHOCK watches lend a sense of power and strength.Dial rings and raised hour markers create a 3D visual, complemented by a black finish and red accents.Made to resist shocks and water up to 200m, the GA-100-1A4ER comes with a black resin strap.Anti-slip technology is added to the over-sized buttons for fast and assured use.In addition to its 1/1000-second stopwatch, velocity indicator, World Time, and 5 alarms, this model offers unparalleled function and performance.

  **We are a Casio UK authorised dealer**

**New boxed stock with full retail boxes & paperwork**

**WATER RESISTANT**

200 Metres Water Resistant  
**ACCURACY**

+/- 15 seconds per month  
**ALARM FUNCTION**

5 Daily Alarms: Each will sound every day at the time you set,

Hourly time signal: The watch beeps every hour on the hour,

Snooze function  
**AUTO CALENDAR**

Once set, the automatic calendar always displays the correct date  
**AVERAGE SPEED DISPLAY**

A dial on the watch face displays your average speed travelled over a set distance  
**BAND MATERIAL**

Resin  
**BATTERY LIFE**

Approximately 2 years  
**COUNTDOWN TIMER FUNCTION**

Countdown Range: 24 hours, Measuring Unit: 1 second  
**DATE AND WEEKDAY DISPLAY**

The current date and week day are displayed on the watch face  
**DATE DISPLAY**

The current date is displayed on the watch face  
**DIMENSIONS**

55 x 51.2 x 16.9mm  
**DISPLAY ILLUMINATION**

Auto Light: The watch face will illuminate automatically when you tilt your

wrist towards you. Once activated, this feature will automatically deactivate

after six hours., LED light,

Selectable illumination duration (1.5 seconds or 3 seconds)  
**LAP MEMORY**

100 Records  
**LOW TEMPERATURE RESISTANT**

\-10 °C/ 14°F  
**MAGNETIC RESISTANCE**

The case has been specially mounted to be shielded from magnetic fields.  
**MINERAL GLASS**

Hard glass resists scratching  
**SHOCK RESISTANT**

Patented Hollow Core Guard Structure protects against impact and vibration  
**STOPWATCH FUNCTION**

Measuring Capacity: 100 hours, Measuring Modes: Elapsed time, split time,

Measuring Unit: 1/1000th second  
**VIBRATION RESISTANT**

Resistant against vibration from heavy duty operations  
**WORLD TIME**

Displays the current time in major cities and specific areas around the world