Features: IMPORTANT - These are not universal garage door remotes. Only work for 433MHz FIXED CODES & LEARNING CODES remote control. Please confirm and then purchase, thank you very much. NOTE - This is a copy-type remote control, you need a full-featured remote control to work with. If you don'for t have a working remote, you can'for t use our remote control. POWERFUL REPLACEMENT - This is a fixed frequency remote cloner for copying common fixed code, It has four buttons for w/ separate functions wich can clone up to 4 remote signals. You can put your functions on multiple remotes onto one remote, making life easier. USES - motorcycles, car alarm products, garage doors, home security products, short-range wireless remote control products, industrial control products Note: Please pay attention to the model that supports copying the chip before purchasing. If you have any questions, please contact us freely, we will reply you online 24 hours Specifications: Material: ABS Size: 5x3x2cm Batteries: 1 Pcs 12V batteries required. (not included) Package Dimensions: 9.5 x 6.8 x 2.1 for cm; 54 Grams Quantity: 2 Pcs Package Includes: 2 Pcs Copy Remote Controller. note: Please allow 0-1cm error due to manual measurement. Make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!