This selection includes manual combination locks (for example, a chrome metal dial on the fridge-style box) and electronic systems that combine a numeric keypad with a biometric fingerprint reader. Many electronic models also include backup keys for emergency access.

Many electronic/biometric safes include two spare backup keys and offer a Type-C/USB-C power input as an alternative if battery power fails.

Materials vary by product: the small fridge locker is plastic; biometric/electronic safes use steel alloy; some document organizers use polyester; and fireproof document-style boxes use upgraded silicone-coated fiberglass with PP support material.

The small fridge-style box is listed at 12" x 7.5" x 7.5" (often shown as 7.5" H x 7.5" W x 12" D) with a weight of 1.62 pounds.