MGX EMP-1563B Single Side Flexible Clear Sound Handy Radio Earphone Description:1.Acoustic tube surveillance kit earpiece2. Integrated PTT and microphone3. Transparent Acoustic tube keeps low profile4. Acoustic tube structure5. Clear sound performance make you have no auditory fatigue even wearing it for a long time6. Soft earbud easy and comfortable to wear and can be detachable for hygiene and multiusers7. Durable metal lapel clip8. Available forall brand radios Impedance: 2.2KΩFrequency range: 20-20KHz Operating voltage: 1.1-10V SpeakerSensitivity: 113dB±10% Impedance: 32Ω±10% Rated Pwr: 300mW Max input Pwr: 500mWFrequency range: F0-4KHzShipping & Payment: MGX EMP-1563B Single Side Flexible Clear Sound Handy Radio Earphone