0.08 CUFT, Digital Security Lock Box, Programmable Electronic Lock With 2 User Codes, 2 Override Keys Included, Steel Tethering Cable, Durable Solid Steel Construction, Automatic 20 Second Time Delay After 3 Incorrect Entry Attempts, Easy Grip Handle, Soft Interior Lining, On The Go Security For Cell Phones, Wallets, Keys, iPods & Other Compact But Expensive Items, A Gentle Close Prevents Possible Injury From Unexpected Lid Closure, Uses 4 "Aa" Batteries, Not Included, Interior Dimension 1.9"H x 9.8"W x 7.1"D.