Looking for Bike lock

Buy offer Details

Hi
we need to view from a central point what lock is being opened.
when a lock is opened, we will charge the hotel a fixed fee for that bike that day. We do not need to know how long, or how many times, the lock was opened during the day.
the lock should be open using APP with bluetooth

We will need the simplest solution that attends the above needs.
We will not need the GPS tracking.

We will start with 10 bikes/locks in a few hotels to test the concept.
If OK, we will expand our rental services to other hotels.