10.1inch HD Quad-View Car Monitor With Four Cameras Input is your good choice.Yes, you can buy a TV box and sell electrical equipment. You should know that you can ask the owner. The equipment is mainly a wired interface to connect to the cable and transmit the signal to the display. It also supports infrared remote control. However, the owner needs external speakers to go to the physical store to see that. It's not expensive for around 100 yuan. 10.1inch HD Quad-View Car Monitor With Four Cameras Input is your good choice.