Compatible with Genie Intellicode 1 and 2 openers made after 1996. Automatically seeks frequency 315 or 390 MHz (megahertz). Low battery warning. Easy-to-find buttons. No tools needed to change coin battery. Battery lifetime is greater than 2 years. Secure rolling-code technology. Controls up to 3 doors. Sleek design with visor clip included. WARNING: This product can expose you to chemicals including 13 butadiene which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov. -