In HK, the oldest ones along Tolo harbour over science park use K band, the others use Ka-band with frequency around 33.3-33.4GHz, however the latest model uses K Band again around 24.1-24.3GHz, .and these give very little pre-warning even on the V1. I have borrowed Letsrock’s V1 a couple of times, it generally have a better response over the Passport X50 models, don’t know about Passport 9500ix. |