The decoder box is a retrofit CarPlay and Android Auto Kit that adds CarPlay and Android Auto functionality to a standard vehicle.The kit gives an "" feel and appearance as it retains the existing UConnect display on your dash as well as the controls (rotary controller and steering wheel controls) Unit Functions: CarPlay Interface special for Romeo Stelvio head unit with 6.5/8.8inch screen Wired/Wireless CarPlay,Sync your world in seconds: Music, Maps, Phone calls-always on your dashboard Wired/Wireless Android Auto, less cord, more control.Seamless tech for hands- Built in 2.4G and 5.8G WIFI for suitable connection and Bluetooth 5.0 Technology Control via steering wheel controls and touch control ( * dependent on vehicle specification) and voice control by say: " Hey ..." GPS navigation Apps, Maps, Waze and Maps are all available live traffic information With 2 inputs, allow to add rear and right PAL, NTSC AHD camera. Support HD 360 panoramic cameras connect and Dynamic Guidance Lines, Parking Distance Control. parking style. Plug and play, non-destructive installation, free from wire breaks. Switch in/out of CarPlay display at any time using factory controls determine if your vehicle can install this accord CarPlay interface Voltage: 2 V Power: 5 W Signal-to-noise ratio:25dB name: Wireless CarPlay Android auto module Fitment:For Romeo Stelvio 2017-2020 Material: ABS+ metal Color: As Shown Package Contents: 1 * Wireless CarPlay auto module 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.