Notice: Please refer to the projector user manual when replacing the lamp. Normally, the projector user manual is available on manufacturer's website. The Leankle projector lamp is able to fully replace the Hitachi DT01491 (Lamp part number), and works with projector models listed below. Hitachi DT01431Hitachi DT01433Hitachi DT01491Hitachi CP-EW250NHitachi CP-EW300Hitachi CP-EW300NHitachi CP-EX250Hitachi CP-EX250NHitachi CP-EX300Hitachi CP-EX300NHitachi CP-EX400Hitachi CP-X2530WNHitachi CP-X3030WNHitachi CP-X3030WNJWe sincerely suggest checking either original lamp part number or projector model before ordering it. It only works when the lamp part number or projector model matches yours. Changing a projector lamp doesn't have to be complex, in fact it's easier than you imagine. When doing it, you only need a suitable screwdriver (Not included) to loosen then tighten a few screws. To ensure the projector works better, please perform a dust cleaning for the air filter (For some projector brands only) after replacing the lamp. If the air filter has been used for a long time, consider replacing it too.