Lytespan Alcyon Open Ring PAR20 track head features a wireless stem profile with 365 degree horizontal rotation and 0-90 degree vertical adjustment. Includes accessory holder and retaining ring. Holds one lens and one louver or two lenses, sold separately. Finish available in Matte White, Matte Black or Metallic Aluminum. One 50 watt, 120 volt PAR20 medium base lamp is required, but not included. UL listed. 3.6 inch width x 4.9 inch depth x 6.7 inch length. Compatible with Lytespan Basic 1-circuit, Advent 1 or 2 circuit, and Radius 1-circuit track systems.