A secured transaction is a transaction that is founded on a security agreement. A security agreement is a provision in a business transaction in which the obligor, or debtor, in the agreement gives to the creditor the right to own property owned or held by the debtor.
If your brush has two speeds, and uses brush heads with slim-angled necks, then you have a Sonicare Elite. An Elite toothbrush has a thread collar screw on brush head.
I also have the Hesh 2.0 over-ear headphones which are a bit more expensive but still can't compare to the 50/50. The Hesh 2.0 is attractive and durable but is a bit uncomfortable after a while and doesn't have noise cancellation. The Skullcandy Uprock over-ear headphones are smaller and of similar sound quality to the Hesh 2.0.