Lytespan Alcyon MR16 Glass Cylinder track head features a wireless stem profile with infinite horizontal rotation and 0-90 degree vertical adjustment. Includes a frosted glass lens and an integral glass shield. Class two 12 volt electronic transformer included. Finish available in matte white, matte black, and metallic aluminum. One 50 watt, 12 volt, MR16 bi-pin halogen lamp used without integral lens, or one 37 watt, 12 volt, MR16 bi-pin base halogen lamp used with integral lens, lamp not included. Directional light distribution. 2.75 inch width x 5.25 inch height x 2.75 inch depth. Compatible with Lytespan Basic 1-circuit, Advent 1 or 2 circuit, and Radius 1-circuit track systems.