"A beautiful tool for your arsenal of methods."--BANACHEK. "One of the best designs I've seen. Or haven't seen, completely invisible! SO GOOD!"--DANIEL GARCIA. "Versatile. Clean. Excellent. The next stage of envelopes for magic"--PAUL VIGIL. "A hands off switch device? I LOVE IT! The only problem you'll have is deciding what routine to do first!"--STEVE VALENTINE. "Those envelope suck, no one should buy it, leave it just for me!!!"--DIAMOND JIM TYLER. "Practicality 11/10."--FRANCO PASCALI. "Best switch device ever made. Period." - SIMON BLACK. A revolutionary switching device that fits in your pocket. Black Door allows you to force whatever you want in the cleanest way possible. Hands off. You put a bill, a card, a piece of paper inside the envelope and you hand it to the spectator. The switch is done. You can now perform all your favorite effects without any effort. Black Door comes with 2 envelopes (3" x 4") and 90 minute digital download explaining how to use it and several routines that you can perform with this amazing device. These are some of the routines explained: 50/50 Prediction--Back Night Routine--Bill Switch--Serial Number divination--Card Force-QandA--Magazine Test--Lacuna effect--Mind reading--Add a number. Black Door opens possibilities we've never had before. It is the tool magicians and mentalists have always dreamed about.