The screw connection on the base of the housing optimally protects the inner workings of the watch and simultaneously provides easy access, when changing the battery. After the Alert: The following operations are stopped to save power: all hand movement (excluding the day indicator), Bluetooth connection, if applicable, and alarms engraving process that uses multiple sized dots, resulting in an almost 3D textured finish.<br><br> Signal Range: Up to 2m (may differ depending on surrounding conditions), The watch can be wirelessly connected to a compatible smartphone or tablet via Bluetooth. The energy-saving technology enables access to a host of functions., The watch will automatically synchronise it's time when connected to a compatible smartphone

Approximately 18 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge) The camouflage detail is complemented with gold accents visible across the analogue dial as well as Smart Access makes it easy to operate multi-function watches. Simply pulling out and rotating the crown provides intuitive control over all functions. Multi-Band 6: Automatic Atomic Time updates are received overnight for exceptional accuracy (UK/ EU/ USA/ Japan/ China: home city must be set manually)CASIO WATCH+ World Time lets you select from among approximately 300 cities as the World Time City, Displays the current time in major cities and specific areas around the world A high-capacity solar-charging system harnesses the power of any light source for reliable watch operation with minimal impact to the environment. Polishing technique is applied to selected areas of the case and the bezel to create stunning mirror-finished surfaces MIL STANDARD certified: Cleared the US military procurement standard MIL-46734F, set forth by the United States Department of Defense (official name: A United States Defense Standard), the 12 items of the Garwood Laboratories testing organization, and other rigorous tests relating to wristwatches.