The multimedia projector of shenzhen Ally company is different from other projectors. It is built-in TV tuner and much better in hardware. which is designed for home theatre specially. Take our most popular item PTV01B for example, two advantages of it is that the lamp life is long, from 6000-8000 hours and the lamp cost is low, only $12.00/PC. The picture aspect ratio can be switched from 16:9 to 4:3. It is very popular with family as people can enjoy the "movie feel" in their house with satisfactory effect at a competitive price.