brand new and high quality Product testing method: The lines that make up the connection include: the same display device, 1.4 standard HDMI signal transmission line (A-type male to A-type male), mobile phone data line + charging head. First connect the Micro USB connector of the same display device to the data interface of the mobile phone, and then connect the HDMI cable to the HDMI-A female connector to form a basic HDMI signal transmission line. It is worth noting that the same display device can only work through a borrowed power supply, so don't forget to connect the phone's original data cable to the Micro USB female port on the side of the adapter, and then turn on the power. Connect with HDTV After the playback terminal is assembled, transfer to the high-definition display terminal. The high-definition display terminal we tested is a SamsungLA40C530 40-inch full HD LCD TV (16:9 widescreen, with HDMI and USB ports and full support for 1080P HD). Mobile phone screen and HD TV image synchronization When the mobile phone and HD TV are normally turned on, and the HDMI icon appears on the mobile phone screen or TV screen, it means that the mobile phone's HDMI signal is normally transmitted to the HD TV through the same display device. Package included: 1 x HDMI adapter Note: 1. Due to the different monitor and light effect, the actual color of the item may be slightly different from the color shown in the pictures. 2. Please allow 1-3 cm error due to manual measurement. (1 inch = 2.54 cm)