Abstract: An adjustable stand for mobile devices includes a board-like body, and a first holding unit and a second holding unit. The first holding unit is movable between the upper end and the bottom end of the body. The second holding unit is movable between the left side and the right side of the body. Two lateral members are respectively connected to the left side and the right side of the body. A support includes a bar with two arms extending from two ends of the bar. Each arm has a connector and two connectors are pivotably connected to the left and right sides of the body. The bar can be put on a desk top. The mobile device is positioned by the first and second holding units.

Abstract: An exterior pressure detection device for detecting fluid pressure in pipes includes a body in which a circuit board and a pressure detection unit are received. The pressure detection unit includes a board and a pressure detecting chip which is electrically connected to the circuit board. An L-shaped clamping bar has a connection section and a clamping section which is parallel to the board. A pipe is clamped between the board and the clamping section. When the volume of the fluid passing through the pipe and changes the diameter of the pipe, the board is moved to activate the pressure detecting chip which transfer the change of the diameter of the pipe into a signal which is sent to the exterior main controlling device via the signal output device of the circuit board.