How people listened to music in the 1980’s with their portable radios

Present day device for a portable speaker which you can listen to music from a device like your cellphone. You can buy it at Amazon.com for $36

This is the TDK A12 TREK Micro NFC Bluetooth Portable Mini Wireless Outdoor Speaker. It weighs 6.6 ounces and product dimension of 3.2 x 3.2 x 1.2 inches. Power source is one AAA battery.