Casio MDV-102 Manual — Modules 3305 / 3307

One owner's manual PDF for the Casio module 3305 in English. Casio fitted it in the MDV-102. The same document also covers module 3307. For module 3305, Casio's spec sheet lists one CR2016, with 3 years of battery life and accuracy within ±20 seconds a month; the module first shipped in Jul 2004.