I purchased this intending to install it in a new VOXY, but I ended up replacing the car before I could install it, so I am selling it as new and unused. I confirmed with the seller that it is compatible with the R4.1~ Crown Crossover and the R4.7~ Noah/VOXY. It operates by pressing the volume switch on the steering wheel in the order of +, -. The box is not included. - Model Name: JES TV CONTROL S-MODE X-SERIES - Included Items: Wiring kit - Condition: Unused - Purchase Price: ¥22000 Thank you for looking.