I have several of these and other Tripp Lite surge protectors that protects my electrical equipment from my security system, component stereo equipment, and televisions.
after reading a lot of reviews & technical details I selected this product to protect my valuable electronics. I actually bought two of this ISO BAR 4 outlets . I am using one to protect my TV screen & Blue-ray player & the other to protect my laptop , modem , printer & speaker. it says on the back 12 amp maximum which means you can connect a lot of stuff without worry about the capacity. however it's featuring : Sturdy metal case (fire retardant), solid design , 330v clamp voltage , switch on/off , faulty circuit indicator, 4 outlet plug (protectors) , hanging slots (back). I got a couple of electricity disturbance during couple of thunder storms (I believe transformers got hit by lightening ) but my electronic devices survived & the two surge arresting units continue normal to work !!!
No relay surge protect here, the name "Isobar" says it; each plug has a dedicated wiring so that each item plugged in has full isolated protection. Especially useful when two components might draw power simultaneously just as a surge or spike hits. We have a laser printer in one plug and our copier in another. We could not use a regular surge protector, unless we had two, each one dedicated to one machine only. This Isobar is cost-effective and also indicates faults where an everyday surge protector more often than not does not tell you when it's lost it's full protection effectiveness.
In 2000 I was working for a IT company, who deployed only these to their clients. The others I worked with swore by them. I purchased one, and, today, 15 years later, the only thing wrong with it is that the light in the lighted switch burned out. However it continues to protect and provide power without a hum or any problems at all. It really is a tank.
I bought my first IBAR4 in the 1980's when I got my first computer while working at a software company. This is the one they recommended and I have never regretted it. When the original one from the 80's died, it was only a phone call and it was replaced under the lifetime warranty - I was ecstatic. We now live in a rural area with less than stellar electric service with many surges. Nothing has gotten through this surge protector. Highly recommend.
I learned about Tripp-Lite surge protectors when I worked as a Computer Systems Field Service Engineer over 15 years ago. I visited customer sites where major power-line disturbances had occurred. Some Isobar surge protectors had failed - when they stopped lightning strikes (!), but whatever had been plugged into them remained unscathed. When it came time to specify power protection for my workshop and studio I selected Tripp-Lite Isobar Surge Protectors. I have had no reason to doubt my selection, and it has been over a decade.