... VFD(Variable Frequency Drive) display.3.Embedded detector sensors which requires installation into your rear bumper.4.Power output: 4W; Power supply ... model with 2, or 4, or 6, or 8 sensors.5.Wireless parking sensor,then it is no need to run a ... the rear,just connect the sensors and control box at the back of the vehicle,also save labour cost.6.Speaker car parking ...