The Emerson EM510 Stereo Wireless Headset features wireless stereo sound with Bluetooth Version 2.1 + EDR. Features: Bluetooth v2.1, Supports Bluetooth profiles: HSP, HFP, A2DP, AVRCP. Great for Bluetooth enabled music phones and computers. Easy pairing process. Can be charged by connecting to a computer (USB) or standard AC outlet. Up to 10 hours talk/ 150 hours stand by time. Built-in rechargeable battery that provides up to 8 hours of music playback, Wirelessly listen to and control music (Play/ Pause/ Foward/ Back/ Volume), Answer cell phones calls while listening to music, Built in microphone, Comfortable Behind the neck design with cushioned earbuds. Package includes: Stereo Bluetooth Wireless Headphones, AC Charger, USB Charging Cable, Three silicone earbud cushions (S)(M)(L)