Package List: you will receive 4 pieces of garage door opener remote control compatible with M12 garage door remote mitter for automatic swing sliding door opener, wireless mitter keychain security door controller, meet your use needs and operate well. Compatibility and Control: compatible with M12 garage door remote mitter for automatic swing sliding door opener,one of 4 button wireless controller keychain security door controllers can operate countless door openers contemporary within the control range and control multiple door operators separately, four swing door openers, one sliding door motor, two swing door openers,one sliding door motor, control two sliding door motors by adding two erm12 on each control board respectively, etc. Safe and Reliable Operation: our garage door opener remote control kit is carefully designed and tested, with the lowest power consumption to ensure long battery life (built in dry battery); Adopts RF technology and secure encryption, and the use range can reach 200 feet; Rolling code technology minimizes radio interference, encryption prevents intrusion, providing safety and security for your property. The black garage door remote control is compatible with the M12 garage door remote mitter, operating at 433.92MHZ, with clear instructions and simple programming; Please make sure the garage door opener is completely closed before starting remote programming. Convenient and Portable: the small and lightweight keychain remote switch is easy to carry and can be put into handbags, wallets, pockets, etc., without taking up too much space; The keychain remote control with strong signal mission has a wide coverage, is convenient and flexible, and brings you convenience; Please follow the information before purchasing. Note:Due to different production batches, the color may vary, which does not affect the use. Colour:As Shown Material:ABS Package Contents: 4 * Garage door openers Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!