Sell swim surf ski sport coaching equip/5Km/6M underwater
" 2-5km range/6M underwater"+"3 channels/one coach teaching 3teams"+Real time feedback"+ "two way communication+"hearin
View ArticleSell coachtoswimmer learn to swim gadget 2014 new
swimmers uses and a special walkie talkie for the swim coach to instruct from the side of the swimming pool. Feedback
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