The LB3 from Speco is a DVR/NVR Lock Box with Fan provides extra security for DVR/NVRs and features a key-locked front door, lift-off lid, and a single cooling fan. It is rack-mountable on two or four posts with a 3 RU overall height. There is an additional mounting location for another fan if required in the future and multiple vents with removable vent blockers for active or passive thermal management. Made of durable and strong 16-gauge steel, it has a black static-resistant powder coat finish and interior dimensions of 21.0x17.2x5.0.