Yes, Sonr is absolutely safe for kids. The case is made from eco materials. Sonr is safe to wear because of bone conduction technology. The receiver emits nothing. Bone conduction is simply hearing sound through vibrations in the jawbone and skull.

Sonr can be used by several swimmers because of its antibacterial coating.

Sonr can be used in any water. Doesn’t matter if it is open, chlorinated or salty. We recommend to rinse it in fresh water after the training.

Sonr can be used up to 3 hours without charging.

The coach can train up to 20 swimmers at the same time using one portable transmitter. The radio waves connect several Sonrs to one transmitter. 

Our device uses radio waves to set up communication through the antenna. It receives the waves and transmits the sound. So it can be used with any portable transmitter.

Up to 8 Sonrs can be used simultaneously at the same pool.

Yes. You can use it on the beach. But we don’t recommend to misuse it.

Under swimmer's cap, goggles strap or headband.

IP68 rating makes Sonr totally waterproof and dustproof.

Yes. It is safe. We hear things this way quite naturally.

We hear sound in two ways: through air conduction and through bone conduction.Air conduction is how we hear most of the time. Our eardrums convert sound waves into vibrations sending them to the cochlear —  hence AIR conduction.  Bone conduction, on the other hand, is when those sound waves travel through bones in our jaw and skull. They end up in exactly the same place — the cochlear —  but bypass the eardrum entirely.

No, Sonr is a small disc-shaped receiver. It works with a walkie-talkie.

Yes, Sonr can be placed under swimmer's cap. It also can be fixed on the goggles strap as well as under a headband.

Yes. You can use it in, on and under the water.