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Our automatic electric-lock unlocking system was introduced on musenka.com.

The automatic electric-lock unlocking system that has been in operation at our office ECHO was introduced on musenka.com.
The system for this Bluetooth unit is a development product from our company’s TDL Division.
Linked to a Beacon device, it works by automatically unlocking the door with an electric lock whenever staff, carrying iPhones, approach the door.

▼musenka.com
http://www.musenka.com/case/bluetooth_key_demo_android.html#apc