Product Code: SUPV1 Price: Check Latest Directed Sirius - SUP-V1 -Universal Plug & Play Vehicle Kit For your SP4-TK1 (sold separately) The SP4-TK1 sits snugly in the cradle, which you can secure to your windshield using the included suction-cup mount. The antenna attaches to your roof with its magnetic base, while the adapter plugs right into your car's cigarette lighter or power port to provide power to the radio. Send the sound to your car stereo using the SP4-TK1's built-in wireless FM transmitter, or connect the cradle directly to your stereo's auxiliary input, if it has one, with an optional set of patch cables.