basicXL BXL-HEADSET20. Device connectivity: Wired, Device interface: 2x 3.5 mm, Cable length: 2 m. Ear coupling: supraaural, Acoustic system: closed, Headphone frequency: 20 - 20000 Hz. Microphone frequency: 30 - 16000 Hz, Microphone sensitivity: 58 dB. Weight: 0.113 kg