[ISW-501T / ISW-801T] What is the difference between ISW-500 / ISW-800 and ISW-501T / ISW-801T (T model and non T model)?

We use cookies to understand how you use our site and to improve your experience. This includes personalizing content and advertising. By continuing to use our site, you accept our use of cookies. To learn more, click here for our Privacy policy.