The 12-8773-F-ETL-84-24V is a 33"-36" Fire Rated Surface Vertical Rod Panic Device and comes with ETL Panic Trim Electrified Fail-Safe. This panic is for an 84" door height, is 24 volts electrified, and is available in two finishes. US10B/613 Oil rubbed bronze finish and US32D/630 Stainless Steel Finish. The 73 Function is ETL Trim Fail-Safe, Power off, Unlocks Lever, and No Cylinder. 

73 Electrified ET Trim - Fail Safe
Power Off, Unlocks Lever (No Cylinder)

8700 Series Surface Vertical Rod Exit Devices
Has two-point latching and is adjustable through the center case.
Part of Sargent's full line of exit devices that provide the best combination of simplicity, strength, durability, aesthetics, and innovation. The top and bottom latch bolt projections are adjustable through the center case.

Door Types: Wood or metal 1-3/4"(44mm) Thick Door; Over 1-3/4" to 2-1/4" specify thickness and order as a 31- prefix. 4-1/2" (114mm) minimum stile with trim and 3-1/2" (44mm) minimum stile without trim
Door Widths:E Rail - 24" to 32" (61cm to 81cm) No cutting required for 32" door; F Rail - 33" to 36" (84cm to 91cm) No cutting required for 36" door; J Rail - 37" to 42" (94cm to 107cm) No cutting required for 42" door; G Rail - 43" to 48" (110cm to 122cm) No cutting required for 48" door