Audiosharp AS1124 The Lightest Black Wireless Bluetooth 4.1 Stereo Heaset Headphone Earphone Earpiece Earbuds with Microphone & Remote Volume Control for Sports Running Gym Exercise 11.5 grams.Probaly the lightest headset in the world. Crystal clear sound. Crafted with built-in 10mm dynamic driver, and CCAW voice coil, created surprising full- bodied timbre, clear and bright, restore crystal clear sound. Wind noise reduction. Special headset design and electronics technology filter wind noise, improve call clarity. Sweat-proof. Effectively prevent sweat and rain interfere with headset operation. Multipoint pairing.Connect to 2 mobile phones simultaneously.