Denso PR-700UDM Operator's Manual page 8

 If smoke, abnormal orders or noises come from the product, immediately turn
off the host computer, unplug the USB cable, and contact your nearest
dealer.
Failure to do so could result in fire or electrical shock.
 If foreign material or water enters the product, immediately turn off the host
computer, unplug the USB cable, and contact your nearest dealer.
Failure to do so could cause fire or electrical shock.
 If the product does not function correctly or the housing is damaged, turn off
the host computer, unplug the USB cable, and contact your nearest dealer.
Failure to do so could cause fire or electrical shock.
8