What is oppofindx3' s black card for?

It is a charger and an exclusive mobile phone case. OPPO Find X3 is a mobile phone released by oppo on March 1 1. OPPO Find X3 uses a 6.7-inch AMOLED screen; It is about 163.6 mm long, 74 mm wide, 8.26 mm thick and weighs about193 g; Equipped with white, fog blue, kagami Kuro, the universe mocha four colors. OPPO Find X3 is designed with dual main cameras and four cameras. Sony IMX 766 sensor, 50 million pixels,11.56 "photosensitive area, used for main camera and super wide-angle lens. High pixels provide a high shooting experience for OPPO Find X3. The main camera of OPPO Find X3 has OIS optical image stabilization function, with the base of11.56 "and the aperture of F/ 1.8, which can better cope with low light environment or scenes with high light ratio. OPPO Find X3 is equipped with Qualcomm Snapdragon 870 processor, with a large core frequency of 3.2GHz and 15 TOPS AI operation, which brings strong processing power to OPPO Find X3. OPPO Find X3 is equipped with VC liquid cooling module, which can control its thickness while cooling. OPPO Find X3 is equipped with a 6.7-inch AMOLED screen with a QHD+ resolution of 32 16x 1440. Using LTPO hybrid backplane technology, it supports 100%DCI-P3 color gamut display and 1300nit local peak brightness, and obtains the rating of DisplayMate A+. At the same time, the color will be the standard JNCD after factory color calibration. The screen of OPPO Find X3 has intelligent dynamic frame rate. Through the adaptive dynamic frequency conversion algorithm, it supports the adjustment in the range of 1- 120Hz, and can adapt to different refresh rates in multiple scenes.