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Segway's $150 Engine Speaker can play music or sounds for 23 hours when fully
. The speaker syncs with the accelerator. The faster the scooter goes, the louder the sounds are. Segway said its speaker will warn anyone in
that a scooter is approaching. Road safety
believe the speaker could cut the number of
between scooter riders and
. However,
are worried about noise
. They say the
of electric engines is their
. They believe a simple
sound is enough to alert other road users.
