Door locking and access control system. Keyless locking. Open using a smartphone app. Encrypted communication between devices. Entr is a smart solution for access control. With the basic kit, you can create a door locking system with access control via a smartphone app for doors of almost any type and size. The door locking unit can also be operated using an optional remote control, a PIN code reader, or a fingerprint reader; expand the system according to your needs. The door locking unit communicates with other system components on the 2.4 GHz radio frequency. Locking without a key. With Yale Entr, you can lock your apartment or front door without a key: the door is automatically locked; you just need to pull it shut. Only you and authorized individuals can reopen the door via the app or using system accessories. For your increased security, the radio communication between the system components is encrypted. Rechargeable during operation. The Yale door locking unit operates independently of the power grid and is equipped with a 2600 mAh lithium-ion battery. To charge, simply connect the micro-USB plug of the charger to the door locking unit and hang the charger on the door locking unit. During the charging process, the Entr system remains operational.