BUILT IN EXHAUST FAN: Built in fan removes excess hot air, providing a safe and correctly tempetured environment for your expesive DVR, Computer or Electronic equipment. KEY & LOCK, W/ REMOVABLE LID: 2 Unique keys are provided so you can securely lock the DVR box, front door must be unlocked for lid to be removed which provides easy access to back of DVR, PC, server or other electronic hardware 16 GAUGE HIGH STRENGTH STEEL: Manufacted using thibjk sheets of roled steel. These are unltr secure lock boxes, meant to secure and last for many years. CUSTOMIZABLE PUNCH OUT HOLES: Punch put holes allow for desired wire placement with out compromising security of lock box, none, 1 or 10 many to choose from in diffrent postions INDUSTRTY BEST 10 YEAR SUPPORT: Ares Technology group the industries best support on all our products inclduing access control, power supplies, server equipment and more! Email us at support@arestechgroup.com.