The Bluetooth Stereo Headset comes with Ultra-small size & ultra-light weight, Bluetooth 4.1 chip and hands-free call with built-in high-performance Speaker & Mic, offering wonderful music and clear communication. Its lightweight and compact portable size is perfectly suitable for office and traveling use.   Features: Bluetooth 4.1 technology ensures strong signal and fast transmission and offers high-fidelity stereo music. Compatible with iOS / Android / Windows Smart phones and other Bluetooth-enabled devices.The Bluetooth headset with 4g lightweight, super mini size provide you long time wearing comfort, and guarantee 100% stable. Easy to use and custody.Built-in rechargeable Lithium battery lasts up to 2 hours of talking time or 2 hours of music playing time and 48 hours of Standby Time on one full charge.High-sensitivity microphone grasps the detail of voice, ideal for in-car calling or working use. Multi-point Technology enables you to switch between your business and personal phones.Simple operation, easily control playing / pausing, answering / ending / rejecting an incoming-call and redialing the last number. Specifications: Bluetooth Version: Bluetooth 4.1Supports HSP, HFP, A2DP, AVRCP protocol Operation range: Up to 10 meters High-quality Built-in Rechargeable Li-ion batteryTalk Time: 2 hours Music Playing Time: 2 hours (The Music Volume will affect the time)Standby Time: 48 hoursCharge Time: 1-2 hours