Flymemo HV-600 Bluetooth 4.0 Stereo Headphone with Sweatproof Noise Cancelling for Sport/gym/workout with Microphone for Iphone Samsung Galaxy and Other Android NOISE CANCELLING TECHNOLOGY: The leading echo elimination / noise cancelling technology provides high quality stereo and clear sound. LEADING BlUETOOTH V4.0+EDR .: Perfect for on-the-go usage, roaming away from your connected cellphone (without walls) and still keeping connection. SYNC WITH 2 DEVICES: It can be connected with up to 2 bluetooth devices, like iPad+iPhone, at the same time through bluetooth version 4.0. STYLISH WEARING: Light weight, flexible and soft neck band design. Up to 5 hours talk time/ 4 hours music time and 120 hours standby time. Bluetooth range: up to 10~15 meters. BUILT-IN MICROPHONE : Make and take calls safely and easily, no matter what you're doing. Hands free.