9 channels; up to 9 groups can train in the same area at the same time
IP54-rated transmitter and IP68-rated receiver
Bone conduction receiver for comfortable, lightweight wear (39 g)
Up to 120 m above water and 50 m at depths of 1.5-2 m
Simple, intuitive operation
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30-Day Money-Back Guarantee
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3-Year Warranty
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Description
Clear Communication for Real Water Training
The TT120 underwater communication system is built for swim schools, water sports clubs, surf, kayaking, and sailing programs, water safety training, and coaching teams that need clear, reliable communication in and around the water. It helps address common training challenges such as background noise, limited communication once students are in the water, unclear instruction at a distance, and interference when multiple coaches are teaching at the same time.
Designed for real water training environments, the TT120 combines waterproof performance, stable communication, and easy operation to support clearer, more efficient instruction. Additional receivers can be added as needed.
Built for Wet Training Environments
The receiver is rated IP68 for prolonged immersion, while the transmitter is rated IP54 to handle splashes and light water exposure during daily use.
Long Wireless Range Above and Below Water
The system provides a transmission range of up to 120 meters above the water surface in open environments, and up to 50 meters underwater at a depth of 1.5 to 2 meters.
9 Channels for Multi-Coach Training
With 9 available channels, up to 9 coaches or training groups can operate in the same area at the same time, helping organize group lessons more efficiently.
Open-Ear Bone Conduction Comfort
The receiver uses bone conduction technology, so users can hear coaching audio clearly without placing earbuds inside the ears. The open-ear design improves comfort and helps swimmers stay aware of their surroundings.
Secure and Flexible Wearing Options
The transmitter can be clipped to a belt or pocket with the back clip, or worn around the neck with the included lanyard. The receiver features an ergonomic headset design for a secure and comfortable fit during movement.
Key Training Features
One-Touch Mute
Briefly press the power button on the transmitter to pause audio transmission, then press it again to resume communication.
External Audio Input
Connect an external audio device to play recorded instructions or background audio during training sessions.
Long Battery Life
The transmitter runs for up to 10 hours on a full charge, while the receiver operates for up to 5 hours for daily training use.
Easy Operation
- Large buttons make operation simple during active training
- Receiver volume can be adjusted for comfortable listening
- Magnetic charging helps make daily charging quicker and more convenient
Real Customer Use Cases
See how customers use the TT120 in swimming lessons, professional training, and in-water coaching.
Swimming Lessons
Help learners hear instructions clearly in and around the pool for more efficient teaching.
Watch Video
Professional Team Training
Support real-time communication during high-performance swim training and structured practice sessions.
Coach and Athlete Feedback
An Italian professional swimmer and coach tested the TT120 during training and shared positive feedback on its audio performance, ease of use, and real-time coaching support in the water.
Package Includes
Why Choose RETEKESS
Trusted by 1.68M+ water sports users, with a 30-day money-back guarantee and 3-year warranty for confident purchasing.
Need pricing or a tailored setup?
Get a Custom Solution
Clear Communication for Real Water Training
The TT120 underwater communication system is built for swim schools, water sports clubs, surf, kayaking, and sailing programs, water safety training, and coaching teams that need clear, reliable communication in and around the water. It helps address common training challenges such as background noise, limited communication once students are in the water, unclear instruction at a distance, and interference when multiple coaches are teaching at the same time.
Designed for real water training environments, the TT120 combines waterproof performance, stable communication, and easy operation to support clearer, more efficient instruction. Additional receivers can be added as needed.
Built for Wet Training Environments
The receiver is rated IP68 for prolonged immersion, while the transmitter is rated IP54 to handle splashes and light water exposure during daily use.
Long Wireless Range Above and Below Water
The system provides a transmission range of up to 120 meters above the water surface in open environments, and up to 50 meters underwater at a depth of 1.5 to 2 meters.
9 Channels for Multi-Coach Training
With 9 available channels, up to 9 coaches or training groups can operate in the same area at the same time, helping organize group lessons more efficiently.
Open-Ear Bone Conduction Comfort
The receiver uses bone conduction technology, so users can hear coaching audio clearly without placing earbuds inside the ears. The open-ear design improves comfort and helps swimmers stay aware of their surroundings.
Secure and Flexible Wearing Options
The transmitter can be clipped to a belt or pocket with the back clip, or worn around the neck with the included lanyard. The receiver features an ergonomic headset design for a secure and comfortable fit during movement.
Key Training Features
One-Touch Mute
Briefly press the power button on the transmitter to pause audio transmission, then press it again to resume communication.
External Audio Input
Connect an external audio device to play recorded instructions or background audio during training sessions.
Long Battery Life
The transmitter runs for up to 10 hours on a full charge, while the receiver operates for up to 5 hours for daily training use.
Easy Operation
- Large buttons make operation simple during active training
- Receiver volume can be adjusted for comfortable listening
- Magnetic charging helps make daily charging quicker and more convenient
Real Customer Use Cases
See how customers use the TT120 in swimming lessons, professional training, and in-water coaching.
Swimming Lessons
Help learners hear instructions clearly in and around the pool for more efficient teaching.
Watch Video
Professional Team Training
Support real-time communication during high-performance swim training and structured practice sessions.
Coach and Athlete Feedback
An Italian professional swimmer and coach tested the TT120 during training and shared positive feedback on its audio performance, ease of use, and real-time coaching support in the water.
Package Includes
Why Choose RETEKESS
Trusted by 1.68M+ water sports users, with a 30-day money-back guarantee and 3-year warranty for confident purchasing.
Need pricing or a tailored setup?
Get a Custom SolutionSpec
Specifications
View detailed specifications for the TT120 transmitter and receiver.
| Size | 260*50*23mm |
| Weight | 158g |
| Battery | Li-ion Battery, Model: 123658, 3500mAh |
| Nominal Battery Voltage | 3.7V |
| Transmit Power | 50 nW max |
| Signal-to-Noise Ratio | 63dB Stereo SNR |
| Frequency | 97-101MHz |
| Frequency Response Range | 40Hz-15KHz |
| Number of Channels | 9CH |
| Channel Spacing | 200KHz |
| Distortion | 0.1% THD@STEREO, ∆f = 67.5 kHz |
| Operating Time | Approximately 10h |
| Transmission Distance | 120m in the open water environment; 50m in an underwater environment at depths of 1.5m to 2m |
| Charging Time | Approximately 5h |
| Waterproof Rating | IP54 |
| Size | 130*95*50mm |
| Weight | 39g |
| Frequency | 97-101MHz |
| Battery | Li-ion Battery, Model: 521333, 270mAh |
| Nominal Battery Voltage | 3.7v |
| Operating Time | Approximately 5h |
| Charging Time | Approximately 3h |
| Waterproof Rating | IP68 |
| Size | 260*50*23mm |
| Weight | 158g |
| Battery | Li-ion Battery, Model: 123658, 3500mAh |
| Nominal Battery Voltage | 3.7V |
| Transmit Power | 50 nW max |
| Signal-to-Noise Ratio | 63dB Stereo SNR |
| Frequency | 97-101MHz |
| Frequency Response Range | 40Hz-15KHz |
| Number of Channels | 9CH |
| Channel Spacing | 200KHz |
| Distortion | 0.1% THD@STEREO, ∆f = 67.5 kHz |
| Operating Time | Approximately 10h |
| Transmission Distance | 120m in the open water environment; 50m in an underwater environment at depths of 1.5m to 2m |
| Charging Time | Approximately 5h |
| Waterproof Rating | IP54 |
| Size | 130*95*50mm |
| Weight | 39g |
| Frequency | 97-101MHz |
| Battery | Li-ion Battery, Model: 521333, 270mAh |
| Nominal Battery Voltage | 3.7v |
| Operating Time | Approximately 5h |
| Charging Time | Approximately 3h |
| Waterproof Rating | IP68 |
FAQ
Product Review
The coach can send the messages to the team members clearly inside the water, and they can focus on training. The simple and strong functionality of the transmitter, transmission range inside the water and the durability satisfies the team coaches. Especially the voice is crystal clear even inside the water.
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