No need to shout anymore, the swimmers hear you anyway Meet SONR - an innovative communication system for real-time coaching Up until now, swimmers couldn’t hear the coach's instructions underwater.Now, with SONR, swimmers hear every coach's word. SONR helps to save the coach's voice during the training. The coach just talks into the walkie-talkie, and the athlete receives precise instructions underwater. Thanks to bone-conduction technology, SONR receiver transmits crystal-clear sound through the bones to the inner ear. Real-time coaching overcomes the main obstacle in all water sports - lack of communication. Providing feedback on the spot, coaches can keep their swimmers fully focused, improve training technique, refine the strokes and achieve greater results quicker. Real-time headset for swimmers Help all your swimmers - Guide your Swim Team Bone conduction technology allows the swimmers to hear the coach’s voice even underwater. Thanks to this, the coach can correct the swimmers’ movements right when needed. Connect to an unlimited number of SONR Receivers with a single coach’s radio. Manage swimming teams in real-time on 6 different channels. Switch channels on the radio, and talk to all swimmers at the same time, specifically with one of them, or divide them into groups. Radio Transmitter has 6 different channels Up to 5 coaches can use SONR system simultaneosly at the same pool SONR Receiver has the built-in metronome function SONR's receiving distance is up to 984ft (300 meters), and up to 3 ft (1 meter) in depth SONR can be used up to 3 hours without charging SONR can be used in any water Pros about SONR "SONR really helps working with advanced level and distance swimmers. It’s good for private lessons and swimming sets. I recommend this product". "This device is fantastic for pool training because the swimmers can hear with absolute clarity while they are swimming". "We use SONR with our college team and our campers when we are teaching technique. It’s awesome to be able to communicate with the swimmer while they are attempting to make stroke improvements. It’s easy to provide feedback in real-time". How to wear it? Thanks to its sleek and lightweight design, SONR does not cause any discomfort. The swimmers get used to it in a couple of minutes and can then fully focus on the training process and the coach’s guidance. Tech Specs Radio Transmitter High and Low powerDimensions: 5,3 x 2,2 x 1,4 in (135 x 57 x 35 mm)Weight: 8,8 oz (250 g)IP54 water and dust protectionBattery: 3000 mAhEarphones inset SONR Receiver Receiving distance open water: above 650 ft (300 m)Receiving distance in a pool: above 165 ft (50 m), under 3 ft (1 m) waterDimensions: 2,4 x 0,55 in (61 x 16 mm)Weight: 1.05 oz (30 g)ATM5 waterproof standardBattery life: Up to 3.5 hours (mixed-use), 1.5 hours (talk time)Magnetic charging cableLed indicates battery status, charging and power status (on/off). Frequently Asked Questions How many SONR receivers can be connected to one radio? The coach can train unlimited number of swimmers at the same time using one portable transmitter. How many channels can I use? The radio has 6 different channels. The first channel is always common. By switching channels on the radio, the coach can talk to all the swimmers at the same time, or specifically with one swimmer, or divide them into groups. It is very easy to use. For how long can I use SONR? SONR can be used up to 3 hours without charging. Tell me more about bone conduction technology. 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. Can I use SONR in open water? What about chlorinated or salty water? 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. Frequently Asked Questions How many SONR receivers can be connected to one radio? The coach can train unlimited number of swimmers at the same time using one portable transmitter. How many channels can I use? The radio has 6 different channels. The first channel is always common. By switching channels on the radio, the coach can talk to all the swimmers at the same time, or specifically with one swimmer, or divide them into groups. It is very easy to use. For how long can I use SONR? SONR can be used up to 3 hours without charging. Tell me more about bone conduction technology. 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. Can I use SONR in open water? What about chlorinated or salty water? 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.