Safeguard your valuables and keepsakes with the SentrySafe 0. 5-Cubic-Foot Electronic Safe. Perfect for on-the-go security, this SentrySafe is built to secure valuables in cars, trucks, dorms, campers, and boats--where safety is needed and space is limited. The solid-steel construction prevents tampering, and the included steel tethering cable provides additional protection by keeping the safe attached to the location. 0. 5-cubic-foot capacity fits laptops up to 15. 4 inches. Solid-steel construction and steel tethering cable included to deter theft. 10-number keypad that stores up to 2 distinct codes for multi-user use. Fits under a bed or in the trunk of a car for concealment. Gentle close hinge spring prevents issues resulting from unexpected lid closure. Electronic Security Safe.