Model: Omni-directional MT-BTH014 Speaker: φ50mm Call noise reduction to reduce noise. 123±3dB is the sensitivity. Sensitivity of Mic: -40±3db Impedance: 32Ω±15% 1000mAh battery Response frequency: 20–20,000 Hz Color: Yellow, Jungle Green, Snow White, Silent Black Interface: Type-C Weight: 350±5g; cable length: 1.20±0.01m