Features: 

• Does not need batteries. Uses existing red lights on your Star Adventurer or Star Adventurer 2i.  Brightness can be fully adjusted from completely off to very bright by rotating the clip on the dial in relation to the red mode 
• LED Evenly illuminates the polar scope reticle Emitter housing glows in the dark to make it easy to find in the dark
• Illuminator can be installed directly on the polar scope or on the optional sky-watcher dovetail bar  
• Installs and uninstalls in seconds with no tools or modifications. The 11 inch optical cable fits around most equipment and allows full movement of the mount 
• Can be left on for your entire imaging session thus simplifying touch-up polar adjustments 
• Storage case included
• Weight: 1oz 
• Star Adventurer mount not included, pictured for reference only
• 3D printed