Casio G-Shock GW-M5610U-1 Men's Solar Black Resin Sport Watch

This model possesses tough solar and multi-band 6 Atomic timekeeping technology housed within an even slim profile octagonal case. Non-stop tough solar power provides energy via a small solar panel combined with a large-capacity rechargeable Battery that enables a variety of energy-hungry functions to operate smoothly. Black resin Band digital watch with neutral face.

auto light feature will not work if the battery level falls below medium (marked as m on the face of the watch).

turn on or off the auto light function by holding down the light button and turn wrist at a 40 degree angle towards the user in a dark environment

Casio

With the launch of its first watch in November 1974, Casio entered the wristwatch market at a time when the watch industry had just discovered digital technology. As a company with cutting-edge electronic technology developed for pocket calculators, Casio entered this field confident that it could develop timepieces that would lead the market.

Today, Casio is focusing its efforts on solar-powered radio-controlled watches: the built-in solar battery eliminates the nuisance of replacing batteries, atomic timekeeping means the users never have to reset the time. Recently, Casio launched a series of Bluetooth watches that sync to the users cell phone to automatically update the time. Casio is always moving time forward.