Review on Jasco 98999 Universal Hands Free Headset by Dave Sapp

It was also called General Electric for me, but I assumed that GE had bought Jasco. The ergonomics are good, the 3.5 mm jack is iPhone 4S compatible, the sound quality in the headphones is good, but the built-in volume control creates too much noise for the interlocutors, so it doesn't work well for sales webinars. Next I bought a '3.5mm Wired On-Ear Speakerphone' which is iPhone 4S compatible and doesn't have a built in volume control so there is no interference.