Model No. T137.463.11.030.00 is driven by a Swiss quartz movement (Caliber DGT‑2040 or Calibre 4012), powered by a Maxell CR 2025 battery, and includes an EOL (battery end-of-life) indicator. https://saicreationswatches.com/products/t1374631103000-t-classic-prx-digital-watch-for-men