title: what is the difference between bounded and unbounded device?
body: <p>I’m new to both iOS and BLE, so kindly bear with me if this question is very basic. </p>
  
  <p>What is the distinction between bounded and unbounded devices?  I’m working with <code>CBCentralManager</code> for BLE in iOS, and I’m trying to figure out how to pair them through <code>CBCentralManager</code>. </p>