The whole drum consists of six parts: 1- shell (shaft tube) high-strength titanium alloy hollow cylinder; 2- the energy part, the main body is the lithium battery charging circuit (installed at the bottom of the shaft) and the light energy battery on the back of the reel; 3- Information processing and storage part, equivalent to a microcomputer, installed under the communication module; 4- The communication part is divided into wireless communication and optical communication, which is installed on the top of the shaft; The 5-page scroll has three layers and can be wound on the spool. The first layer is the handwriting board, the second layer is the display screen (full-screen handwriting), and the third layer is the photovoltaic cell. 6- Satellites or drones and balloons.
Usage: Take out the scroll and sing: Praise God XX! Unwinding scroll: the screen shows the image from the unmanned reconnaissance plane, showing a surrounding area.