TF520
MSRP：# G101621
SONAR
TF740
MSRP：#101619
SONAR / GPS / COMPASS
TF750
MSRP：#101620
SONAR / GPS / COMPASS
TF640
MSRP：#101604
SONAR / GPS / COMPASS
TF650
MSRP：#101614
SONAR (3D Mapping) / GPS / Compass