Waterproof Skiing Swimming Teaching Equipment Durable Snowboarding Swimmer Receiver Bone Conduction Headphone

Introduction:

The set is consist of a transmitter (for the coach) and several waterproof receivers (for swimmers)
1.the transmitter ( must purchase separately):
7 channels, each channel can support up to unlimited receivers at the same time
has a range of about in 120-200 meters can be connected to a microphone
2.the receiver:
The waterproof receiver fits under any kind of swimming cap and is designed to stay in position even during start and turns
The volume can be adjusted so it is totally child-friendly

1.Waterproof
2.Volume adjustable
3.Light weight and comfortable to wear 
4.10 meters underwater pressure, with a range of 200 meters
5.Crystal sound while not isolate the surrounding voice
6.Battery working 2 hours between charges

1.Can I order samples to test first?
Yes, we accept samples order.
2.Does it have built-in battery?
Yes, and you can charge the device via power adaptor and USB cable.
3.How long can it work between charges?
About 2 hours.
4.Is it water proof?
Yes, it is.
5.How many swimmers can stay at the same channel?

At least 10.
6.Is it suitable for adults?
Sure, it is catered for children and adults.
7.Will it be too tight or too loose?
No, it is comfortable to wear and won't fall easily.
8.How fast can I get it ?
By DHL,UPS, Fedex or TNT express service, it can arrive in 2-3 days.
9.What about the warranty?
One year.
10.How can I make payment?
Payment can be : Western union, Moneygram , paypal or T/T
11.Does it isolate other sound?
No, because it is bone conduction design so it won't block the surrounding voice.