SMAKN&reg; TCRT5000 4CH Infrared Line Track Follower Sensor Module for Smart Car Product Name : Track Sensor Module;Model No. : TCRT5000;Output Channel : 4 Working Voltage : 3.3V-12V;Detect Distance : 1-8mm;Focal Distance : 2.5mm PCB Size : 31 x 32mm/ 1.2" x1.26" (L*W);Sensor Board Size : 1.5 x 1.3cm/0.59" x 0.51"(L*W);Cable Length : 18cm/7" Hole Size : 3mm/ 0.12";Material : Electric Part Net Weight : 20g;Package Content : 1 x Track Sensor Module