The Chamberlain 747E 433MHz Garage Door Opener is a reliable and efficient device that allows you to remotely control your garage door with ease. With a sleek design and advanced technology, this garage door opener from Chamberlain offers convenience and security for your home. The 433MHz frequency ensures a strong signal for smooth and consistent operation, making it a practical choice for any garage. Purchased brand new a while ago but never fitted as I realised I needed the 418MHz version.