A sighting device includes a body, a light emitting unit, a bracket, a first adjusting unit and a second adjusting unit. The body couples to an arm having a barrel. The body is disposed relative to the arm in a first direction defined on an up and down axis. A third direction is defined as a direction of the barrel on a front and back axis. A second direction is defined as a left and right axis. The bracket couples to the light emitting unit. The first adjusting unit couples the bracket to the body and moves the bracket relative to the body. The second adjusting unit couples the bracket to the body and moves the bracket relative to the body.