Simple Remote, and cheap, delivered with Case. By not against the shadow of a manual! We must get back into the D90's manual to learn how to enable and manage this remote, after more or less conclusive tests (walking a blow here, a blow here does not work) back to the D90's manual to see the need also enter the menus to parameterize the remote duration defaults to 1 minute! A recapitulative sheet, detailing the operative mode according to the case, had been welcome.