1.Visual Enjoyment: Compared with other economical bulbs, our bulbs have higher brightness, more vivid colors, and more delicate picture quality, allowing you to have an excellent visual enjoyment,extra long lifetime also up to 2000-3000 hours 2.Careful Test: All items are And will be packaged in good condition before dispatch, each lamp bulb also have been meticulously tested to confirm that the bulbs that arrive in your hand will work well. 3.Apply To: Compatible With Vivitek D755WT D755WTi D757WT D751ST D756UST D756USTi 5811118004 23354001SR Projector,as long as your machine model is correct, you can buy it with confidence and there will be no problems. 4.Easy to use: All lamps are easy to install and it will only take a few minutes to get your machine back in , however it is important to note that please turn off the projector and allow it to cool down before installing the lamp.