Features: and high quality Made of high-quality materials, more durable Vacuum cleaner replenishment accessory: The IR CRON sensor works with for i7 e5 i3 i4 Series , replacement the easy damange or broken top bumer sensor The sensor is for detecting the Virtual Navigation Wall / virtual barrior, ground obstruction , receiving and navigating the remote control schedule for the the charging dock cleaning access route.make your works smart again. Material: Plastic colour: As shown Package Contents: 1 x IR Dock Sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.