Haydon HAY-2LEDMOD Dual-Flash LED Module for Dummy Bell Boxes, 3 V CR123A

Introduction to the Haydon HAY-2LEDMOD and its key features

The Haydon HAY-2LEDMOD Dual-Flash LED Module is a purpose-built, battery-powered indicator designed for use inside dummy or decoy bell and alarm boxes. Compact, lightweight and simple to install, this module simulates the look of an active alarm using two super-bright white LEDs that alternate in a distinct dual-flash pattern. Running from a single 3 V CR123A lithium cell (battery not included), the HAY-2LEDMOD offers a convincing visual deterrent without the need for mains wiring or complicated installation.

Key features at a glance:

• Alternating dual-flash pattern with approximately a 1.5 s cycle.
• Powered by 1 × CR123A lithium cell (3 V) — battery not included.
• Very low power consumption: typical battery life up to around 3 years depending on environment and usage.
• Small form factor (approx. 42 × 18 × 18 mm) and lightweight (~12 g) for easy fitting.
• Supplied with self-adhesive pads and short connection leads for fast installation.

The HAY-2LEDMOD packs several practical design decisions into a tiny package. Below are the product specifications followed by the benefits they provide in real-world use.

• Model:HAY-2LEDMOD
• Power / Battery:1 × CR123A lithium cell, 3 V (battery not included)
• LED colour:White (designed to show through coloured bell-box lenses)
• Flash pattern:Alternating dual flash (~1.5 s cycle)
• Lead lengths:Approximately 30 cm to first LED; additional ~15 cm between LEDs
• Typical battery life:Up to ~3 years (environment and usage dependent)
• Dimensions:Approx. 42 × 18 × 18 mm (H×W×D)
• Weight:Approx. 12 g
• Mounting:Self-adhesive pads supplied
• Battery included:No

• Realistic visual effect:The alternating dual-flash pattern closely mimics the appearance of live alarm beacons when viewed through coloured lenses (red, blue, green, yellow), making the device effective for deterrent or display applications.
• Low maintenance:With low current draw and typical battery life measured in years rather than weeks or months, the HAY-2LEDMOD is convenient for installations where access is occasional or difficult.
• Plug-and-play installation:Short connection leads and supplied adhesive pads mean the module can be fitted inside most dummy bell housings quickly — no soldering or mains wiring necessary.
• Compact and light:The small footprint allows the LED module to fit inside narrow or shallow bell boxes and display props, preserving the external aesthetics.
• Cost-effective:With a suggested retail price of £9.99 (typical cost price £7.91), it represents an inexpensive upgrade to decoy alarms and retail props compared to more complex powered solutions.

The HAY-2LEDMOD is suited to a variety of situations where a credible visual indication is required without the complexity of a fully functional alarm system. Typical use cases include:

• Dummy/decoy alarm boxes:Enhance the realism of dummy bell housings used as a low-cost deterrent on properties. The bright alternating flash gives the impression of an operational alarm, which can discourage opportunistic intruders.
• Retail displays and props:Use in shop displays, trade-show stands or theatrical props where a convincing flashing light is needed but running mains power would be impractical or hazardous.
• Heritage sites and period properties:Where permanent wiring is not desirable, the module allows owners to simulate an alarm presence without altering historic fabric or requiring intrusive installation.
• Temporary or remote installations:For short-term installations, holiday properties or remote outbuildings without mains access, the battery-powered module provides an effective visual signal with minimal upkeep.
• Training aids and demonstrations:Useful for sales demonstrations, training courses or product demos where a visible alarm indicator is needed without activating a full alarm system.

When selecting a flashing LED module for a dummy bell box or display, there are a few common alternatives: single-LED blinker modules, multi-LED strips, and mains- or battery-powered strobe units. The HAY-2LEDMOD occupies a useful middle ground in terms of realism, ease of installation and operating cost.

• Single-LED modules:Simpler designs use just one LED with a basic blink. While cheaper, they often lack the alternating dynamic effect that makes the HAY-2LEDMOD look more like a genuine alarm beacon. The dual-LED alternating flash is more convincing through coloured lenses.
• Multi-LED strips or high-brightness modules:These can produce intense light and complex patterns but are generally larger, draw more power and may require more frequent battery changes or mains power. For a subtle, low-power decoy application, HAY-2LEDMODs long battery life is a major advantage.
• Mains-powered strobes:These provide the fullest realism and can be suitable for active systems, but they require professional wiring and installation. For situations where wiring is not possible or desired, the HAY-2LEDMOD offers a cost-effective alternative with minimal fuss.
• Battery chemistry differences:Some competing modules use AA or AAA cells which are widely available but physically larger and in some cases give shorter service life depending on the electronics. The CR123A lithium cell used by HAY-2LEDMOD delivers high energy density and more stable long-term output for compact installations.

While specific user reviews will vary by retailer and deployment, typical feedback themes for products like the HAY-2LEDMOD include:

• "Very realistic effect through a red lens — looks like a real alarm from the street."
• "Easy to fit inside an old bell box and the battery has lasted ages — no frequent changes."
• "Compact and unobtrusive, perfect for display work where we didnt want to run mains power."

These representative comments highlight the module's primary strengths: realism, ease of installation and long battery life. For the most reliable picture of user experience, check retailer reviews and ratings where the product is sold.

Installing the HAY-2LEDMOD is straightforward, but a few practical points ensure safe and lasting operation:

• Use only one CR123A lithium cell as specified. Do not substitute other battery types or voltages.
• Observe correct polarity when fitting the battery to avoid damage.
• Mount the module using the supplied adhesive pads on a clean, dry surface inside the bell box for best adhesion.
• Dispose of used lithium cells responsibly in accordance with local regulations; do not incinerate or puncture batteries.
• For any regulatory or conformity details (CE/UKCA), consult the manufacturers datasheet if required for your market.

The Haydon HAY-2LEDMOD Dual-Flash LED Module is a practical, cost-effective solution for anyone who needs a convincing visual alarm indicator without the complexity of a powered alarm system. Its alternating dual-flash pattern delivers increased realism compared with single-LED blinkers, while the compact design and long battery life make it ideal for dummy bell boxes, retail displays and temporary installations. Priced competitively and easy to fit, it offers excellent value for applications where appearance and low maintenance are priorities.

Whether youre outfitting a decoy alarm for deterrence, enhancing a shop display or creating a realistic prop, the HAY-2LEDMOD combines simplicity, longevity and convincing visual performance — making it a smart, low-cost choice.