The whole product shape is a cube, and the whole square is divided into several small squares through several grooves. The top and bottom surfaces of the product are ordered to list more small squares. With the "square" as the medium, the core of the block chain is mapped to the product, which is close to the core value of the product. However, the positive and negative sides of the products are the same, giving people a feeling of rigor, refinement, order, security and science and technology. The product is adapted to two mainstream Android interfaces: Micro and Type-C. The two interfaces only need to be switched by flipping, one step in place. The product is matched with an ordinary smart phone or a spare mobile phone, and the camera can be turned on to realize the remote monitoring function, distinguishing the same type of products with a single function. The back end of the product can be connected to the USB interface of the network cable and the mobile hard disk, so it can become a private cloud disk and enjoy intelligent hardware services such as remote download, privacy encryption, mobile phone expansion and multi-screen interaction. The product is small and convenient as a whole, suitable for most places in the home. The overall shape of the product is a cube, which is divided into several small blocks through several grooves. The top and bottom surfaces of the product are arranged into more small squares in an orderly manner. By taking the "squares" as the media, the core of the blockchain is mapped onto the product, which closely follows the core value of the product. The front and back of the product are consistent, and the entire whole renders a feeling of being rigorous, refined and orderly with a sense of security and technology. The product is compatible with two major Android interfaces: Micro and Type-C. The two interfaces can be switched by just one step, I .e. flipping. The product can be equipped with an ordinary smart phone or a backup phone. When the camera is turned on, the remote monitoring function can be realized, thus making the product distinguished from same type of products with a single function. The back end of the product can be connected to the network cable and the USB interface of the mobile hard disk, so it can become a private cloud disk and enjoy intelligent hardware services such as remote download, privacy encryption, mobile phone expansion, and multi-screen interaction and so on. The overall product is small and convenient, which is suitable to be placed in most areas of home.