Four-way monitoring system Supports access to 4-way 1080P cameras. Supports recording overwrite. Supports single-channel, dual-channel, four-channel and other display modes. Easy installation and operation. Supports external DC 9V-36V. Supports switching to the rearview camera when reversing. Supports low power consumption mode and continue to record when the vehicle power supply is stopped. Standardly equipped with 64G TF card from Hikvision.