The product is a special aluminum alloy shell for Nano, with a full-featured design and a chamfer design with a sense of science and technology. The shell feels comfortable and comfortable, protecting the motherboard without losing style. Multi-directional ventilation and heat dissipation design, with heat dissipation holes reserved on three sides, A ventilation hole is specially set for the built-in fan at the top, so that heat dissipation and cooling are more efficient. Accurate fitting of reserved holes, exquisite manufacturing technology, It fits well with the hole position and is beautiful. With the anti-slip rubber pad, the placement is more stable, the bottom contact area is reduced, and the heat dissipation performance is improved to a greater extent. Simple assembly, complicated rejection and more stable and safe use. Colour:Gray-Black Material:aluminum alloy Package Contents: 1 * Aluminum alloy shell body (without antenna) 1 * GPIO conversion board 1 * Button cable 4 * Non-slip rubber pad 2 * Button 1 * Keypad 1 * Hex screwdriver 1 * Hexagon socket screw package Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.