· Most portable personal vehicle with world's first 3D Posture Control System · 9.3mph Top speed and ~12.4 miles range · 8.3 lbs to carry it anywhere. · This is a customized electrical skateboard. For specific date of shipment, please refer to the shipping information below.
The skateboard cannot travel at speeds below 9.3 miles per hour.
The context indicates only the skateboard's top speed; however, it must travel at speeds below that in order to reach the stated velocity. 
( z1 possible :polarity - :ARG1 ( z2 travel :ARG0 ( z3 skateboard ) :ARG1 ( z4 speed :mod ( z5 below :op ( z6 speed-quantity :quant "9.3" :unit ( z7 mile-per-hour ) ) ) ) ) )