FS-T9 uses to observe indoor scene via door-peephole individually, and also can integrate a cell-phone by coupling with an adjustable adapter to take snapshots or video record as well as viewing it via the screen of cell-phone.
Adjustable adapter: with elastic pull-hook which can freely adjust width to attach a cell-phone and the slip-rail uses to position FS-T9 to the center of camera lens of cell-phone.
It comes with optics focus function.
Can view it from another side of FS-T9 to use it as a mini telescope, and can work with cell-phone as well.