The "Begins With" criteria filter is what your looking for
You will type
400*2*1.5
1.5 is another way to say 1 1/2
The answer is DS-30A. The Roland DS30A is a 24-bit Digital Reference Monitor which can add pristine 24-bit/96kHz. They are small speakers.
There are pros and cons to using special characters in email subject lines. Generally, marketers report higher open rates.
Some report better engagement, but many don’t.
There are also reports of special characters causing problems with deliverability, mostly because spammers became very fond of special characters for a while.