Mini Portable Bluedio N2 Bluetooth 4.1 Wireless USB Stereo Headphones Microphone red Type: Bluetooth Stereo Headset Ear Coupling: Earbud (In Ear) Talk Time: about 4 hours Music Time: about 4 hours Standby Time: up to 180hrs Charge Time: about 2 hours Operating Range: up to 10m (free space) Bluetooth Version: V4.1