Using for tickets skytrain, but it will be a one-way ticket. Can press the buy it yourself at the automatic ticket machine like MRT in Thailand country. The price of the ticket depends on the chosen destination, plus the insurance card to another S $ 1, which can be redeemed at the ticket machine as well. After that we walked out from the station of destination. The Exchange will be given refund within 1 month only. If it exceeds 1 month, no refunds.