Yealink UH34-Dual, Entry-level USB headset, Noise-Canceling, Binaural, Leather. Technical Specification Product: Yealink UH34 Dual Teams Product type: Headset Connectivity technology: Wired Recommended usage: Office/Call center Headphone frequency: 20 - 20000 Hz Cable length: 2.1 m Weight: 118 g Product colour: Black