Sonos Roam SL is the mic-free version of the original

Source: Sonos

Sonos updates its Roam speaker to release a version without its built-in microphone. The Sonos Roam SL looks identical to the original but costs US$20 less than it. This small speaker can still connect to your Wi-Fi network and be included in a Sonos multi-room audio system. It has a built-in battery and Bluetooth capabilities. And it is waterproof and dust-resistant (IP67 rated), with a battery life of up to 10 hours.

Since it doesn't have a microphone, it loses the Auto Trueplay feature, which uses the mic to tune the speaker to sound better in the room you've placed it in. As Engadget pointed out, it makes sense the feature isn't available since the Roam SL is designed to be taken around with you. In some markets, the Sonos Roam SL is now available for pre-order on the company's website, and it'll launch on March 15.