... volume: 80db; Screen type: Digital tube; You can choose the model with 2, or 4, or 6, or 8 sensors.5.Wireless parking sensor,then it ... ,just connect the sensors and control box at the back of the vehicle,also save labour cost.6.Speaker car parking sensor,it can ... tell you the alarm distance in english timely.7.Flashing sensor,water-proof sensor and any colour ...