The document is a user guide for the BT-Pusher Bluetooth Marketing System, which utilizes Bluetooth technology to send marketing materials like leaflets and coupons to nearby customers' phones. The guide outlines the system's features such as automatically searching for and sending files to multiple Bluetooth devices simultaneously, supported file formats, and typical use cases in locations like shops, hotels and exhibitions. It also provides instructions, illustrations and answers to frequently asked questions about using the system.