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" (70 mm), thickness 0.5" (12 mm). Full Aluminum and Super slim design: Made out of full aluminum, conducive to the heat dissipation of the LED chip board. Thickness 0.5" (12 mm), lightweight and compact body fits narrow places. Shock and vibration resistant. Technical specifications: DC 12V, 3 Watt, 240 Lumen. Color Temperature 3200K (Warm White), Lighting angle 120 degrees, Energy class A++. Dimmable with PWM dimmer (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 use. (Transformer is not included in the package). Color Name: Warm 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 required, mounting hole depth only 0.5", cutting hole 2.3"-2.5" (58-65 mm). 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 Wattage: 3W Luminous Flux: 240 Lumen Cable length: 7" (18 cm) Dimensions: Outer Dia 2.75", Inner Dia 2.3", Height 0.5" Color Temperature: Warm White 3200K Lighting angle: 120 degrees Mounting Hole: Dia 2.3"-2.5" (58-65 mm), Depth 0.5" (12 mm) Weight: 1.8 ounces each NOTES: THIS CEILING LIGHT IS DIMMABLE.