If you are buying an intercom to talk to the person on the back of your bike, almost every spec on the box is irrelevant to you. You are fifty centimetres apart. Two kilometres of range solves a problem you do not have.
Here is what actually matters two-up, and what you can safely ignore.
Ignore the range figure
Range is the headline number on every intercom sold, because it is the easiest thing to put in big type. For group riding it matters. For rider-to-pillion it is noise.
Even our shortest-range model reaches 800 metres in open terrain. Your passenger is close enough to tap you on the shoulder. Paying more for 2 km of group range buys you nothing unless you also ride with other bikes.
What actually matters
Full duplex, not push-to-talk
This is the one spec worth checking. Full duplex means both people can talk at once, like a phone call. Push-to-talk means one person talks while the other listens, and you take turns.
For a group of eight that distinction barely registers. For two people having a conversation over six hours, it is the whole experience. Interrupting, agreeing, laughing over each other — that is what a conversation is, and half-duplex kills it.
Every Hysnox model runs full duplex. If you are comparing against something else, check this before anything else.
Battery that outlasts the day, twice
Two-up means two units running, and the weaker one ends the conversation. A day trip with stops can easily run twelve hours from helmet-on to helmet-off, and an intercom that is also playing music draws harder than the talk-time figure suggests.
Our 900 mAh models give around 28 hours of talk; the smaller 700 mAh unit gives around 18. Both will clear a normal day. On a touring week, what matters more is that all Hysnox units charge while you ride over USB-C — a battery pack in the tank bag removes the question entirely.
Fit on two different helmets
This is the part people forget. You are fitting two units to two helmets that may be completely different shapes — your full-face and their modular, or a half-face with no chin bar to mount a boom mic to.
Hysnox kits ship with both a clamp mount and an adhesive base, plus speakers thin enough for most ear pockets and an omnidirectional microphone that works on open-face shells where a boom cannot reach. Fit both helmets at home, not in a car park at the start of a ride.
Full walkthrough: how to install and pair a motorcycle helmet intercom.
Wind noise is worse on the back
Your passenger sits in the turbulent air coming off your back and shoulders, not in clean air behind a screen. Their microphone has a harder job than yours, and if one side of the conversation sounds rougher at speed, that is usually why — not a faulty unit.
CVC noise cancelling with DSP filtering is validated for clear voice up to 120 km/h (75 mph), but microphone placement does half the work. If your pillion sounds muffled, move their mic before you blame the hardware.
Most of that noise can be fixed without new hardware. See highway wind noise and your motorcycle intercom for the full set of microphone, helmet and windscreen fixes.
Music sharing, if you both want the same soundtrack
Two Hysnox units of the same model can share one song, so you both hear the same track from one phone. It is a small feature that gets used constantly on long motorway stretches where nobody feels like talking.
Which model for two-up
All six Hysnox models work rider-to-pillion. Three are built specifically for it:
- HY-1001 — the budget pick. 800 m, 700 mAh, around 18 hours of talk. If the intercom is purely for you and your passenger, this is enough intercom.
- SHARK 02 — 1000 m, 900 mAh, around 28 hours, CVC 12. The step up is battery, not range.
- H9 — closely matched to SHARK 02 on paper: 1000 m, 900 mAh, 28 hours, IP65. Compare both on the spec table and pick on what you prefer in the hand.
When you should buy more than you need
One honest exception. If you ride two-up most of the time but occasionally join a group, a group model is worth the difference — it pairs with your pillion exactly like a two-rider unit does, and it is there when the group ride happens.
What does not make sense is buying a 10-rider unit purely for the two of you. You are paying for a chain you will never build. If group riding is in your future, read chain vs mesh and how many riders you can connect first.
Before your first ride together
- Pair both units at home and leave them on for ten minutes — most pairing problems show up in the first few minutes, not the first few seconds.
- Charge both fully. The weaker battery sets your range.
- Sit on the bike, helmets on, engine off, and talk. Fix microphone position now.
- Agree a volume. Your passenger is behind a windscreen you are not.
If something does not behave on the road, most of it is explainable: intercom troubleshooting — dropouts, wind noise and pairing fixes.