... 4. no machine Model No.: DL-4019CDescription: learning code and fixed code popular Learning RF Remote control (Remote control duplicator)1. ... , rolling curtain, etcFrequency:315Mhz or 433MhzLearning code:Fixed code & learning code 3. Copy method:a. Delete the original code.Press ... (same frequency) to one copy remote.Attention: during the learning, pls make two remotes as close as possible, press the ...