: It is valid for a single day (from 12:00 AM to 11:59 PM) for the specific zones you select.
The phrase "" likely refers to a combination of two distinct travel and communication needs: the Mobilis one-day transit pass for Paris and SIP (Session Initiation Protocol) software for making calls over the internet . Download mobilis02day sip
The is a one-day unlimited travel pass for the Paris metro, RER, and bus networks. : It is valid for a single day