Magic Leap is known for its secrecy. The company kept its One headset under wraps for years, teasing out details with ambiguous conference speeches and restrictive press opportunities. It should come as no surprise, then, to hear that developer units are being shipped out with an unusual caveat: while not in use, they have to be kept in locked safes. The detail comes from Bloomberg alongside confirmation of a "limited" developer roll out (a larger batch of units will be sent out later this year.) It's safe to assume that the company wants to avoid the fabled iPhone 4 incident.