Low voltage 12VThe voltage is 12V 50W, please turn off the power before installation, make sure the input voltage is 12v, not 220V, otherwise it will damage the bulb. 50x44MM5.3mm between 2 pins, bulb size 50x44mm, please make sure the bulb fits your lamp before purchasing. Note the size difference between MR16 GU5.3 and MR11 GU4 bulbs. Dimmable80lm warm white 2700K, dimmable, instant lighting without delay, create a warm and comfortable lighting environment. Easy to Install2000 hours of life, 6-piece package is more durable, standard GU5.3 base, easy to install without any tools, do not touch immediately after turning off the bulb to prevent burns. ApplicationMR16 GU5.3 halogen bulbs are ideal for use on recessed or track lighting. Suitable for general indoor lighting of living room, bedroom, kitchen, hallway, hotel, restaurant, cafe, etc.