Defender Basic 604 Black-Red (MPN 63605) are wired in-ear headphones for mobile devices. The 3.5 mm mini-jack connects them to devices with a matching socket.
Plastic housings contain 10 mm diaphragms. The cable connects on both sides, and the finish combines black and red.
The frequency range is 15–20000 Hz, sensitivity 85 dB and impedance 32 ohm. These specifications describe the sound hardware and wired connection. A microphone or extra accessories are not specified.