HAO BD NITE Style AMBI selector for PTW Infinity built-in the Fluorescent function which gives you visibility of your selector in the dark.
 
 
Installation instruction for infinity version :
See picture 3.
Slide the gear 1. off the selector. Take off the cover 3.
Fix the gear 1. with screw 2.(Don't forget the busing ) onto your Infinity gear box.
Put the cover 3. back onto the gear body . Bowl shape side up.
Slide the 4. selector back onto the gear body. Screw in the hax screw in the selector against the 3. cover to secure the selector onto the gear body. 
Done! 
 
 
Made in Taiwan
BB type: 6mm 0.2g BBs
Power source: Electronic PTW 11.1v 
Power: 90 m/s = 0.81J with 0.2g BBs
J / cm2:  2.835 J/cm2
No primer using function