... Tracks Place of Origin: China (Mainland) Model Number:LSJD2500WL single or double track Remote Control Electric Curtain System, Motorized Drape ... : (Standard Length as follows)- 1. 0—2.0 Meters (1.1,1.2,1.3,1.4,1.5 ... 1.9,2.0) - 2. 0—3.0 Meters (2.1,2.2,2.3,2.4,2.5 ... 8,2.9,3.0)- 4. 0—6.6 Meters (4.1,4.4,4.7,5.0,5 ... decode so that it can be controlled by a single button. The curtains can run one by one or ...