Master Lock 5900D is a small and handy personal safe that is ideal to use while travelling or when having fun outside. The gadget will protect your personal belongings with a four digit combination. However, especially for those who love to listen to music while in the train/plane/boat/rocket, the personal lock features an access port for headphones. While your device is inside the portable device, you can still listen to music and recharge your smartphone.
The portable lock is totally water-proof and shock-proof. This ensures that your belongings are not damaged in any circumstances. Finally, the personal lock is big enough to fit the essentials such a your passport, cash, and mobile phone but would also fit in your hand luggage. This is a perfect trade-off between size and functionality.