What is the communication method? カスタマーセンター September 19, 2017 03:21 Updated Follow The NinjaLock communicates with smartphones by Bluetooth connection. Related articles Does the NinjaLock app require monthly fee? Can I operate the NinjaLock in places where has no signal? Which kinds of doors can the NinjaLock be attached to? Comments 0 comments Please sign in to leave a comment.