Bluetooth Headset Portable 4.1 Wireless Bluetooth headphones Hi-Fi In-Ear Sports Headphones-Noise Cancelling Hands Free&nbsp;for iPhone, Android, and Other Leading Smartphones (Black) Outstanding Audio Quality Bluetooth 4.1, better Bluetooth signal, 4D high-definition sound quality, HIFI fever acoustics, let you listen to music or talk as immersive. Long Battery Life-With two 140mAh replaceable batteries, talk time up to 6-8hours, fast make up electricity, meet your high electricity demands of work and entertainment. Comfortable Design -Portable Bluetooth Headset, the bend in-ear design looks fashion and sporty, comfortable to wear without pain, let you share music in the motion state anytime and anywhere. Voice prompt  Switch machine prompt, Incoming calls report, Acoustic answer. With this function, you can clearly know the status about the headphone. Connect Two Devices at The Same Time --- Pair it with two Bluetooth-enabled devices at the same time and the status bar above the mobile phone displays the power of the Bluetooth.