This is a directional LED replacement bulb for replacing a comparable halogen incandescent bulb - typically in a reading light.
It has an output of 40 lumens which is equivalent to a typical 18W incandescent bulb.
The Magnum Ring is available in several styles: single and double contact styles - both indexed (BAY) (with off-set pins) and non-indexed (BA) (with opposite pins).
This is the reasonably specialized double contact bayonet indexed style.

Soothing, warm light; no burns - warm to the touch
Replaces BAY style (15mm) indexed incandescant double contact bayonet bulbs
11 - 15V DC; no RF noise; gold-plated contacts
10,000+ hour service life, with no filament to burn out or break
Not recommended for use in fixtures with colored lenses (colored lenses should have colored LEDs)
NOT for use in navigation fixtures
In-line regulator (sold separately) allows use with 24 volt systems; use one regulator per fixture