This is an OEM Antenna. And the NGVA3 shields interference from AT&T vs non OEM SiriusXM Car Antennas. Highly recommended to purchase OEM SiriusXM Antennas vs generic. The NGVA3 and NGVA1 are the only 2 OEM Aftermarket Antennas produced in the last 5 years for Car use. 

The best SiriusXM magnetic car antenna on the market! An upgrade over the already fantastic NGVA1, the new NGVA3 car antenna has been redesigned for improved reception.

Cable length: Approx. 23ft. 

Features:
 

• Mounts on most metal vehicle surfaces and has rubber feet to help prevent scratching.
• Low profile, small size and 23' cable allows the antenna to be placed almost anywhere on the vehicle roof to ensure optimal signal reception.
• Compatible with all radios and vehicle docks that work on the Sirius and XM networks with push on style, single input SMB antenna connector.
• SiriusXM original accessory

Specifications:

Type. . . . . . . . . . . . . . . . . . . Magnetic Mount
Connector. . . . . . . . . . . . . . SMB
Cable Length. . . . . . . . . . . 23 ft (7 m)