inputs.text: battle gps modules - previous \\standard\\ gps units sirf star iii chip one happily using years mtk ii chipset come unto scene impressive specs 165db 4 times powerful ss iii 159db 66channel parallel receiver opposed ss iii 20channel time 12 satellites view 66 channels answer 1 obtain additional waas satellites north america better accuracy 2 saves time keep track different horizon satellites continually come view qstarz 1818xt impressive lockon driving lock 9 satellites error 8m 10m outside north america rehemain lockedon moving never used 10hz function 1hz function navigation programs handle update 1hz anyway 1818x allows 1hz 5hz update 1818xt allows 1hz 10hz update sacrifices battery life 42 hours 24 hours speed fix also amazing cold start seconds hot start faster switch phones bluetooth unit also connected pc used gps mouse using software drivers website allows 10hz button reprogrammed lower freqency desired impressive battery life high quality fast position fix amazing satellite lockon powerful gps receiver available date excellent product ps product reviews please dont penalize products supplier problehematic