Wireless Bluetooth 5 headphones from STREETZ with optimal fit, high sound quality and on-cable call/media buttons for convenient management of calls and music. Optimal fit: the headphones are designed to fit all ears and are comfortable even during long-term use. Built-in remote control: a practical three-button remote control allows you to seamlessly adjust volume, playback and song selection. You can also answer/end calls without interacting with the phone. Deltaco HL-BT300. Product Type: Headset. Connectivity technology: wireless, Bluetooth. Suggested Use: Music. Headphone frequency: 20 — 20000 Hz. Product color: white.