yer i got one from ebay $88 worked great but signals drop out somtimes depends wher yah put it mine was the size or a bout 2 match boxes. if yah get one get one with external antannas for the gps and mobil phone part. nime never had external antannas . thay also bring up a map of wher your bike is on you mobil phone etc . ive removed mine im guna get the external antanna type.
no ther not like a cb antanna just a very small descret ones you can hide but it gives you a better signal compaired to the onboard ones that are built into tha same box as the gps tracker that you would like to tuck away somewher .