The Shure SE215-BK-BT1 is a high quality set of Wireless Sound Isolating™ Earphones that provide concert sound on the go. Perfect for music lovers, and musicians wanting great sound for every day listening. The SE215-K-BT1 utilizes Shure’s renown SE215 In Ear monitors to deliver incredible sound and enhanced bass, while also offering great sound isolation. Featuring Shure’s MicroDriver technology, an advanced miniature driver design that lets these fantastic headphones reproduce sound frequencies of 22Hz–17.5kHz with astonishing accuracy. They’re also super-comfortable, yet fit tightly enough to block out 37dB of outside sound. Easy to operate with the included RMCEBT1 re-chargeable Bluetooth adapter that easy connects to your compatible device. Provides up to 8hrs of play time from a single charge so you can enjoy your media playback or keep time with your band wirelessly.