最安値に挑戦】 CASIO PRO (WSD-F20-BK) smart TREK - 腕時計(デジタル) - www.universitaria.cl
A prototype Global Positioning System (GPS) wristwatch screen indicates its current location as Casio Computer Co's Hiroshi Masubuchi shows off the "world's first watch with built-in GPS" in Tokyo January 6. The
These proto smartwatches paved the way for the Apple Watch