Noise-Cancelling: Christmas Gifts 2017 Bluetooth Headsets are super clear and vivid sound effects with latest noise-cancelling technology gives you the best ever experience to enjoy your music. Sweatproof: This Bluetooth Headsets's Water-resistant Nano-coating efficiently protects sport headphones from sweat and ensure more guaranteed life span, perfect for running, hiking, yoga, exercises, gym, fitness, travelling. Lightweight Comfortable: Ultra light design-19g, enjoy a lightweight construction ergonomic and flexible In-ear design, soft smooth silicone gel surface have comfortable wearing without falling out.It can connect 2 cell phones simultaneously. You’ll never miss important calls or messages.