The Stack-On Portable Security Case provides excellent protection in a slim package. Featuring an electronic locking system, the Portable Security Case is TSA approved for airline travel. The keypad allows for a 3 to 8 digit combination and can be programmed to beep win a key is pressed or can be silenced and the case includes a back up key should your batteries fail. The slim line design and included security cable make this case perfect for secure storage in a vehicle under the seat. The foam padded interior protects valuables in transit and is large enough to fit most tablets.