NO TRANSFORMER NEEDED: The mini recessed LED spot lights are powered by 220 V / 240 V AC, connect directly to the power line without the need for external drivers or transformer 10 Mini Spot (5 Packs of 2 Spotlights): The mini led recessed spotlights are in packs of 2. They have very small dimensions diameter 3.5 cm and height 2.5 cm. Housing hole 3 cm Dimmable: Mini LED recessed spotlight dimmable natural light. High light output, 3W power with 300 lumens equal to a 30W halogen. Dimmable with phase-cut LED dimmer (TRIAC) Interior design: Mini dimmable ceiling spotlights ideal for illuminating rooms with multiple light points. 30° narrow beam angle. The color rendering index greater than 82 makes the colors real 2 YEARS WARRANTY: SIGMALED LIGHTING mini recessed LED spotlights have a lifespan of 25,000 hours, a warranty of 2 years and have all the CE certifications required by European legislation