Wireless electronic locks, Fix the Secretary of Remote Electronic Lock with 3 AA batteries on the inside of the door fra
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Secretary of Remote Electronic Lock
1. Fix the Secretary of Remote Electronic Lock with 3 AA batteries on the inside of the door frame.

2. You can achieve it anti-locked within the office by the remote control,so as not to be disturbed ventured by others.

3. When someone knocks on the door outside, you can remotely unlock, accompanied by a voice "come in!".

4. If you speak the important private telephone and hope not to be interfered from outsiders knock on the door by this time, you can click the Secretary of locks, it will issue a courtesy response "please wait a moment".