EGRD Bluetooth 4.0 Headset Headphones, Wireless Stereo Earphones with 3.5mm Audio Input , Built-in Mic Hands- Free Calling, 450mAh Detachable Rechargeable Battery Provide Super Long Working Time. Hi-Fi stereo and high-resolution sound. Bluetooth 4.0 support A2DP ,AVRCP, HSP and HFP. Amazing sound quality will makes you impressed. 450 mAh super long and high efficiency rechargeable battery. Outclassing most similar headsets on market. High quality materials made, super soft cushion, extremely comfortable for most ear. Ideal for travel use or enjoy your music at night. Noise cancelling tech provide support clear calling environment. Dual connection, connect by bluetooth or 3.5mm audio cable, Ideal for use with Smartphone,MP3,tablet, laptop, computer and other devices.