With this 3 day pass you'll be able to freely travel around the whole MTR network visiting all the sites without having to buy a ticket every time you travel. Simply pick up your MTR Airport Express Travel Pass upon arrival at the Hong Kong International Airport with your mobile voucher and you'll be on your way! Hop onto the Airport Express ride that is included with your card for a quick trip to the city in as little as 30 minutes. For the next 72 hours, you will be able to access unlimited rides on the MTR system by simply waving your pass in front of the card reader. If you want to make quick and small purchases at convenience stores with your pass, you can top it up at the stores or even at any MTR stations! At the end of your travel, take another ride on the Airport Express to the airport and return your pass at the counter to receive your deposit back.