This is an easy favorite of the SENA family*—it’s super low-profile, it’s under $100, and it offers all the same basic functionality of the more expensive models in the lineup. It'll pair with your smartphone via Bluetooth and make or take calls, deliver driving directions from a navigation program, and/or toggle through your music.
It’s offered in two variations – one with a wired microphone that plants into the front of your full-face helmet and has a small, discreet button pad that fits onto the left side of the helmet; and also in an open-face version, which uses a solid articulable boom mic with built-in buttons.
*And here’s the catch: it might not fit in your Bell Bullitt, or any other helmet with a tight clearance around the ears.
The speakers are thicker—11.5mm thick, versus the 6.5mm-thick speakers in all the other models. This is because this minimal design houses the battery inside the speakers. As long as your helmet has cutouts—and isn't a Bell Bullitt—then you're probably OK. But if your ears are already pressed up against the inside of the helmet this might not be the one for you.
Also the functionality of the 3S series is somewhat less than the higher-end models. Namely it will only intercom with one other SENA unit, and the range is slightly limited at a claimed 200 meters, making it a good choice for an extra passenger helmet, or anyone who doesn’t care about the intercom feature and wants to get into a basic Bluetooth for less than $100.
Talk time: 8 Hours
Stand-by time: 7 days
Battery Charging time: 2.5 hours
Intercom working distance: up to 200 meters in open terrain.