Computers, televisions, VCRs, stereos, copiers, and fax machines are common electronic products. New rectangular digital ETR stereo system options were introduced and replaced the dial pushbutton stereos. Clairtone manufactured high-end console stereos, and later televisions, which were recognizable icons of their day. The suites also have cable television, stereos, and refrigerators. Shelf stereos and surround sound receivers are often rated using total system power. For example, modern home and car stereos typically use mechanical rotary encoders as volume controls. In the 2000s, digital players like the iPod became the dominant personal stereos. In the 1990s, portable CD players became the most popular personal stereos. "Walkman" became an unofficial term for personal stereos of any producer or brand. Screen size varies from 5-inch to 7-inch for the double Din car stereos. Parsons began playing drums with Ten Foot Pole and Stages and Stereos. Some personal stereos came with a separate battery case. They were commonly bundled with personal stereos during the 1980s. All limited editions featured Monsoon premium stereos. Compactrons were also used in a few high end Hi-Fi stereos.