This is a script tray with the option to add a usb hub for usb lights. Mounting options include a 1/4" insert for small magic arms and clamps and a cold shoe slot. There is also built in storage for usb lights. This can hold paper scripts or most ipads as well (case depending). 
 
Below are some links to various accessories that should work with the tray, including the specific usb hub that fits and various magic arms, usb extension cables, etc... 
 
*Colors might vary slightly in appearance. 
 
Anker 4-Port USB 3.0 Ultra Slim Data Hub
NEEWER 9.8"/25cm Adjustable Magic Arm with Super Clamp 
Hemmotop Magic Arm Camera Mount 11'' Adjustable Articulating Arm
22in/57cm Adjustable Articulating Friction Magic Arm
Light Options
3Pcs 30cm Flexible USB Power Gooseneck
5pcs LED Circuit Boards USB Light
IKEA JANSJO LED USB lamp
Flexible Mini USB LED Lamp Light
USB Extensions
Cable Matters 3-Pack Short USB to USB Extension Cable 3 ft
3 Pack USB Extension Cable 10 FT
Cable Matters 2 Pack USB On Off Switch