The Pioneer CD-SR11 steering wheel remote is made for the D2 and N3 . You can control many nav and audio functions without moving your hand off of the steering wheel or your eyes off the road . I wasn't sure if I was wasting my money or not but now I'm very satisfied with my purchase. Pioneer web site has write up and manual.If you want see its functions or size see manual under CD-VC1 Accessories/Documents/Owners Manual. Its the same remote but comes with the voice comand microphone for the N3. For some reason the manual is not listed under the CD-SR11 info.