Description

The Casio CMD-40 watch can unlock certain older cars if they use an infrared (IR) sensor rather than modern radio-frequency (RF) key fobs.

How It Works
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• Infrared Technology: The CMD-40 is built with an IR transmitter designed to control home electronics like TVs and VCRs.
• Learn Mode: The watch features a "learn" function that can capture and store an infrared signal directly from a compatible original remote control when held within a few meters.
• Old Vehicle Compatibility: Some early-1990s cars (such as select older European models with infrared key systems) used IR receivers to lock or unlock the doors, allowing the watch to mimic the original key fob if the signal matched.

The Casio CMD-40-1ZT is an iconic Wrist Remote Control watch released in late 1992. As a definitive 90s gadget, it famously combined a traditional digital timepiece with an 8-digit calculator and an infrared (IR) remote control capable of operating televisions (TVs) and video cassette recorders (VCRs).

Here is a comprehensive overview of its technical specifications, features, and current collector status:

Technical Specifications & Design

The watch features an asymmetrical, futuristic housing that feels structurally robust on the wrist, drawing design parallels to Casio's octagonal G-Shock series.

Movement (Module): Powered by the Casio 1174 (or occasionally 1175) digital module.

Case Dimensions: Approximately 44 mm in width and 13–14 mm in thickness.

Materials: Built with a black resin case, an acrylic crystal lens, and a gray-framed digital display.

Strap: Black resin strap with a 22/25 mm lug width and a classic plastic buckle.

Power Source: Driven by a single, high-capacity CR2032 lithium coin battery.

Water Resistance: Rated at WR 30m (3 ATM)—built to withstand accidental splashes but not suitable for swimming.

Core Gadget Features

Long before modern smartwatches, this model allowed users to interact directly with household electronics straight from their wrists:

Infrared (IR) Remote: Pre-programmed with internal codes for major brands of that era (including Sony, Panasonic, Philips, JVC, and Samsung). It featured an IR learning mode capable of copying up to 16 commands from physical remotes, allowing users to switch channels, adjust volume, and control video playback.

Calculator: Fully functional 8-digit calculator operated via the rubberized physical keypad located directly beneath the screen.

Standard Timekeeping: Includes a 1/100-second stopwatch (chronograph), a daily alarm, an hourly time signal, and an automatic calendar.

Common Weak Points (For Collectors)

If you are hunting for this vintage model on the secondhand market, watch out for these typical wear patterns:

Brittle Straps: The original resin bands dry out over decades, becoming rigid and highly prone to snapping near the case shoulders.

Case Wear: On versions with painted silver or metallic finishes, the outer coating frequently flakes or wears down to the bare plastic along the edges.