Opener Systems by Craftsman. Details:CRAFTMAN ½ HP Chain Drive Garage Door Opener Kit lets you come and go with ease by simply using the CRAFTSMAN myQ app. Now from your smartphone, you can control your garage door from anywhere at anytime as well as get real-time alerts. Designed for 7-ft. garage doors, the opener’s rugged chain drive will get the job done, day after day. And with a wireless keypad, outside access is available with a simple touch. Plus, the 3-button remote control allows you to easily program up to three garage doors and boasts a frequency range of up to 1,500 ft. Safety reversing sensors come standard.