The Sunpak Auto 433D and 422D are versatile little power horses with full manual control and tilt swivel head. The only down falls are the high pitch noise when fully charged and the need for the special shoe adapter to fire off camera. The one thing I love about these is the fact that they won't "go to sleep" on you. Set them up wherever you need them, and 4 hours later, they will still be ready and waiting!