After launching a deal that offers a free Samsung 50-inch smart TV last week, T-Mobile today revealed another new promo that offers a free device.

Starting Friday, December 7, T-Mobile is offering a free SyncUp Drive to both new and existing customers. The device is free via 24 monthly bill credits, and to qualify, you need to buy a SyncUp Drive on EIP and add a new SyncUp Drive plan.

The fine print of the deal states that if you cancel service, the remaining balance on the device at full price must be paid.

T-Mobile’s SyncUp Drive is a device that plugs into the OBD-II port on your car, which is found in most vehicles made in 1996 or later, though it’s not compatible with electric and plug-in hybrid vehicles. Once you pop the SyncUp Drive into your car and download the app, you can track your car’s performance, location, and activity and get preventative maintenance alerts. You can also turn your car into a mobile hotspot for up to five Wi-Fi devices. SyncUp Drive offers Roadside Assistance through Allstate, too, which includes services like fuel delivery, lockout service, battery boost, tire change, and tow.

This deal is available in stores for a limited time.

Source: T-Mobile