Liberty Safe Handgun Vaults A/C Adapter QUICK ACCESS: With the AC adapter plugged into the unit, access to your vault is under 1-second AWAKE: Keeps your HDX 150 or 250 "awake" and ready to go in under 1-second! Without the adapter, an additional second is required to "wakeup" the safe ENHANCE YOUR HDX MODEL: AC adapter enhances your already amazing HDX vault by making it quicker on the draw when seconds matter