4 pieces, Lifespan 50,000 hours. High quality workmanship - durable - stylish look. Suitable for Campervan, Boat, Motorhome, Caravan, Yacht, Kitchen, Bathroom, Cabinet, Wardrobe Installation dimensions: Mounting hole: min. 2.3"(58 mm), max. 2.55"(65 mm). Diameter 2.75"(70mm), thickness 0.5"(12mm) Full Aluminum and Super slim design: Made out of full aluminum, Conducive to the heat dissipation of the LED chip board. Thickness 0.5"(12mm), lightweight and compact body fits narrow places. Shock and vibration resistant Technical specifications: DC 12V, 3 Watt, 240 Lumen. Color Temperature 6400K(Cool White), Lighting angle 120, Energy Class A++. Dimmable with PWM dimmer (acegoo 12-24V Dimmer Switch ASIN B08SM3MKTS) Notes: Suitable for Camper Van Motorhome with DC 12V power supply. House power is AC110V-230V.You need a DC12V power supply to power them for home using. (Transformer is not included in the package) Colour Name: Cool White Energy Saving - Same illumination intensity, the power consumption for this LED light is more than 5 times lower than halogen light. Compact Design - Ultra thin design helps expanding your space, lower install requirements suitable for caravan RV, boat, motorhome, Campervan,yacht. Spring Clips Mount - Neat finish after installation. Spring clips, no screwing requires, mounting hole depth only 0.5", cutting hole 2.3"-2.5"(58-65mm) Replace Halogen Ceiling Lights - Easily fitted instead of ordinary 2.75 inch recessed light fixture. No additional accessories are required. Durable - No plastic, no die-casting, full aluminum body offers excellent heat dissipation, 50,000 hours lifespan LED chip. Dimmable - Compatible with DC 12v PWM type LED dimmer switch, dimming range from 0-100%. Specification Input Voltage: 12V DC LED Lifespan: 50,000 hours Light Wattage: 3W Luminous Flux: 240 Lumen Cable length: 7 (18cm) Dimensions: Outer Dia 2.75", Inner Dia 2.3", Height 0.5" Color Temperature: cool white 6400K Lighting angle: 120 degrees Mounting Hole: Dia 2.3"-2.5"(58-65mm), Depth 0.5" (12mm) Weight: 1.8 ounces/each NOTES: THIS CEILING LIGHT IS DIMMABLE.