Retekess TT120 Swim Coach Communicator, IP68 Waterproof Swimming Headphones, Bone Conduction, 120M, Wireless Underwater Communication Unit for Swim Club, Swimming Coaching (1 Transmitter 5 Receivers)

Unmatched waterproof design; with the receiver boasting IP68 for full submersion; transmitter featuring IP54 for splash and drop resistance; swimming communication system offer unparalleled waterproof performance. 120m water surface range; 50m underwater range (1-1.5m water depth); you're always within range; no matter where your training or events take you. Anti-slip design; bone conduction headphones of radio set for swimming training feature an anti-slip ear hook design that does not enter the ear canal; ensuring they stay securely in place during swimming training and providing comfort for extended wear. Increased efficiency; transmitter working 10h; receiver working 5h; radio set for swimming training with its long battery life; increases overall efficiency; this allows instructors to spend more time teaching. Uninterrupted communication; support 9 channels; radio set for swimming training ensures no one interrupts communication; communicate clearly and effectively; stay connected and focused