Master Lock Bluetooth Portable Lock Box With Backup Keypad Entry Getting locked out is never any fun. Instead of leaving a hide-a-key under your mat, be safer and use this Master Lock Bluetooth Portable Lock Box With Backup Keypad Entry ($90). It connects to your smartphone so you can monitor who used it and when. Image Source: homedepot.com Master Lock Bluetooth Portable Lock Box With Backup Keypad Entry $90 from homedepot.com Buy Now