1. 1-button,2-button,3-button,4-button 2 color: black and white 3 code: rolling code 4 material: silica gel and aluminum Transmitter: ... Code: rolling code:Frequency:433.92MhzButton: 1-button,2-button,3-button,4-buttonColor: black and white MOQ: 1000pcssmall samples order are ...