A switch offers everything you could wish for.
Sidenote:
What I did not expect: even if the timer is set to "Off / Off", can trigger the camera using the trigger-head. Then, of course, functions only as a simple remote release without the additional available; the surprised me anyway. Whether this is good (always available for use) or rather not (maybe so but even when switched off permanently consumes a little battery?) Is left your rating.
