Genie 37411V Powerlift 900 Garage Door Opener, 1/2 HpHighlights: 1 2 HP Provides strength and reliability Maintenance free direct drive screw system System will seek with either the 315 or 390 MHZ frequency produced by a remote Genie Intellicode 2 technology prevents unauthorized persons from opening your garage door by automatically changing the access code every time you use it WARNING: This product can expose you to chemicals including 1,3 Butadiene, which is known to the State of California to cause