Part of the popular Casio 7900 G-SHOCK series, the GW-7900-1ER boasts Multi-band 6 radio controlled functionality for most accurate timekeeping as well as being a solar powered watch with 8 months battery reserve. I just had to change my home-city to LON (for London) to ensure that it would receive the time signal from Bury every night.

You can calibrate this feature to be specific to a chosen coast line and even input a date in the future to get readings in advance. I was looking for a watch that was rugged and could take a bit of abuse and so far it has done the job. Too tight and perspiration will accumulate which can cause skin irritations and prematurely weaken the resin of the strap. As is traditional, your G-Shock comes with a user guide that is the thickness of a telephone directory (remember them?Amongst it's portfolio are classic "toughness" brands G-Shock and Baby-G, motor-sport inspired chronograph range Edifice and the fashionista favourite retro collection of digital watches. Both watches are accurate enough to be considered as scientific instruments but it’s nice having the added precision.

At least until the last six months when the display corrupted and I only had to sneeze in the general vicinity of the watch for it to beep and illuminate. One concern is regarding the 4 'screws' on the front face, I have seen numerous comments re these little devils. SKU CAS-GW-7900-1ER Colour: Black Water Resistance: 200 Display: Digital Power Source: Solar Powered Case Depth: 1.It's fine for water sports (including swimming) but don't operate any of the buttons whilst the watch is submerged.