This fourth generation parking sensor system function: 1) Parking sensor: safely parking. LED digital displayer embeded inside the mirror show the distance and graded sound warning the driver. 2) Hand-free system: suit every kinds of cell phone to have a call freely. 3) Recorder and player: record 30~90s seconds talk from your call and play later. 4) A wide view rearview mirror. Inner packing: Dimensions: 35.0 x 22.0 x 6.0cm G.W.: 1.1kg Outer packing: 10pcs/ctn Carton dimensions: 63.5 x 38.0 x 24.5cm G.W.: 11.8kg Delivery lead time 10 days Minimum order 200pcs Supply ability 30,000pcs/month