I'm a lifeguard and I'm using BFU-Wavetooth, swimming class (IPX8) stereo waterproof bluetooth headset, with good sound quality and 3.5mm changeable earphone too, recommend trying, you can google or youtube "wavetooth" for more info.
PS. it also include a waterproof cell phone bag (put your blackberry inside) and a waterproof single earphone too.
|