The default passcode is 0000.

To set the passcode press button 2 and I as shown in fig I and set the desired passcode.

To unlock set the correct passcode and press the button as in fig 2.

To lock leave the button and set the lock to any random number.

Usc the front hook portion to lock the laptops as shown in fig 4.

Use loops to lock as shown in fig 5.