CSBROTHER F437 V4.1 Bluetooth Headset Wireless Mini Earphone Earbud Headphone Ultra Light Hands-Free, Compatible with iPhone, Android, and Other Leading Smartphones - Black Newest Cool and Unique Design--- This metal appearance design bluetooth headset is a combination of clear voice,built-In microphone,Multipoint Function and comfortable fit in order to give you a unique high quality bluetooth headset. Stable Singal Connection and Durable Design--- Within 10 meters operational distances.The long-lasting&rechargeable battery charges 1.5 hours, delivers up to 3-4 hours of playtime and 120 hours Standby time. Connect Two Devices at The Same Time--- Pair it with two Bluetooth-enabled devices at the same time and don't miss your calls when you have two cell phones! Amazing Sound Quality--- Advanced APTX sound and Bluetooth 4.1 technology delivers astonishing acoustics. Noise reduction and echo cancellation ensures you won't miss any details of your phone conversation. Extremely Lightweight--- Crafted with refined aluminum alloy shell,Weight only 6.5g,as light as a credit card,easy to carry and wear.