FASTag is a simple, reloadable tag that enables automated charge deduction at toll booths across the country. It allows you to drive through the toll plazas without having to stop for cash transactions. IndusInd FASTag Recharge/a> Because the FASTag is linked to the user’s prepaid account, the relevant toll charge is deducted. Furthermore, the tag utilizes Radio Frequency Identification (RFID) technology, which is attached to the user’s automobile’s front windscreen. This is only available when the tag is activated.