At the top of the screen of KOOBIE MAX X7 is the 'koobee' logo, earpiece, sensor and a 2-megapixel front camera, which is sufficient for daily selfie applications. At the bottom of the screen, there are three system control buttons. From left to right, they are the menu button, home button, and return button, with background, etc. and touch sensing, which is more sensitive in operation response. The flat side of the fuselage is wrapped with a silver metal waistline, and the top of the fuselage is a MicroUSB data cable interface and a 3.5mm headphone jack. The volume control button is placed on the left side of the fuselage, and the power button is placed on the right side of the fuselage. They are made of metal material, which feels good, and the two buttons can be operated when holding the machine with one hand. Coolby MAX X7 adopts a detachable back cover design, supports dual card dual standby function, is compatible with GSM and WCDMA two network modes, and the theoretical transmission rate can reach 7.2Mbps. The card slot setting is quite special. It uses a large and small card slot design. The left one is a small card slot, and the right one is a standard SIM card slot. The back shell of the fuselage is still made of plastic material. On the top of the back, there is a 13-megapixel main camera with a fisheye shape. The lens part is slightly recessed, which can effectively avoid scratches. On the right side of the lens is an LED flash. In the center of the back is the Koobee logo, and the bottom right is the speaker hole of the phone. HiFi chip brings an excellent audio and video experience. In terms of the playback interface, the music playback interface of the KOBI MAX X7 continues the previous design style. It is very easy to get started. It works well with the player’s built-in equalizer and sound effect setting tools in terms of aesthetics and practicality. The sound quality has been enhanced in both hardware and software. The Coubi MAX X7, which is positioned for the ultimate audio and video, is naturally a highlight of the mobile phone. The CS4398+CS8422 dual chip is built in the mobile phone, which is the so-called Hifi music chip. Especially in the field of music playback, in order to improve Coubi MAX X7's sound effects, this chip is mostly used in high-end CD players, which greatly improves the sound quality of mobile phones. In the music playing interface, click the icon on the upper right to display the interface as a window. In terms of video playback, the decoding ability of the mobile phone chip is relatively ordinary, and the three formats of rmvb, wmv, and flv cannot be played. From the perspective of the playback effect, fast forward and fast reverse will not cause mosaic problems. In the 5 packaging formats we copy into the mobile phone Among the 1080p videos, Cooper MAX X7 can only play mp4 and avi two formats smoothly, but the loading speed is not too fast, there will be about 1-2 seconds of buffering waiting. At the same time, users can also adjust the details of the sound effects according to their own preferences, but the adjustment function must be done when the headphones are inserted. In addition, it is a bit regretful that the original headphones of the mobile phone do not seem to be very powerful and do not achieve the effect of a good horse with a good saddle. Therefore, if users want to use purer music, they can also use higher-quality headphones.