Check the listing for details. Eris HD10BT Headphones. Color: Not Available, Condition: Open box. Listed at 116.89 USD. Studio Sound Wherever You GoProfessional musicians and audio engineers rely on high-quality headphones in the studio to make sure they can hear every sonic detail. PreSonus Eris HD10BT headphones provide studio-quality audio performance with the mobility and freedom of Bluetooth connectivity. Active Noise Canceling (ANC) reduces ambient sounds by up to 18 dB, so whether you're walking down a busy street, or sitting in the middle seat on an airplane, you can listen to your favorite music, podcasts, or binge-worthy TV series in vivid sonic fidelity.Professional PerformanceEris HD10BT headphones are built with 1.57-inch (40 mm) drivers that deliver superior clarity and extended bass response you'd expect from professional studio headphones. The over-ear design ensures optimal sound isolation.