VFD display parking sensor Model: VI300 Number of sensor: 4 sensors (can option 4, 6, 8 and wireless 4 sensors) Kind of Display: color VFD Phonic reminder: BI-BI-BI or speaker voice warning Operating voltage: 10.8-15V Max. Consumption: 3W Operating temperature:-40 -- +80 degree Celsius Buzzer volume: about 80db Max. detect distance (Suppose the detection target is a flat wall area):2.0M Verbal alarm function: Provided Multi-function alert: Provided