A device which can be very helpful to handicapped as well as instructors , by the use of gestures and some other movements .
A device which can be very helpful to handicapped as well as instructors , by the use of gestures and some other movements .
A device which can be very helpful to handicapped as well as instructors , by the use of gestures and some other movements .
A device which can be very helpful to handicapped as well as instructors , by the use of gestures and some other movements .