Terk by Audiovox XMICRO2 XM Mini Roof Mount Antenna Replacement antenna for single-input XM radios Recommended for all XM radio products Extra long 23' cable, Low profile design Replacement antenna for single-input XM radios (dual-input radios require XM-SP splitter) Recommended for all XM radio products Extra long 23' cable Low profile design Measures 1.38 x 0.5 x 1.25 inches (W x H x D)