Yale Bluetooth communication module allows the lock to communicate and be controlled via a Smart Phone (within Bluetooth range of the lock) using the YALE Link App 
Can be paired with Yale Link Wifi Bridge to operate lock remotely from anywhere
Compatibility: Compatible with YDM 4109, YDM 3109, YDR 4110+, YDD 424, YDR 50G, YDR 41, YDM 4109 RL, YMF 40, G- Slide
Set your lock location with the App and the phone will prompt you to unlock your door when you approach it.
Add or delete codes, cards, or fingerprints (depending on your model) without using the lock keypad.
Manage authorization including user codes and set up visitor/ one time codes from your phone
Monitor the entrance, alarm and register the history of the lock from your phone
Requirement: Mobile devices with Bluetooth 4.0 or higher version iPhone 5 or later version/ iOS 8.0 or higher version Android 5.0 or higher version