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.
The Equate Soft Toothbrush is just that cheaper with soft bristles. I think they also mave medium bristles but I always get the soft because my wife likes soft and I just get the same because that really does not make a difference. The Equate brand toothbrushes last as long as any other toothbrushes.