Feature: 1. IP54 waterproof, high quality materials, sturdy and durable, long service life. 2. Designed with ear hooks, it is not easy to fall when using, reliable in use. 3. The sound is clear, which is very suitable for use at sea and can be used with confidence. 4. G‑shaped design is ergonomic and comfortable to wear. 5. Suitable for ICOM M33 T60B. Specification: Condition: 100% brand new Item type: Two Way Radio Headset Material: ABS Color: As picture shown Weight: Approx. 38g Microphone: Environmental noise: 36 dB (maximum) Reference working voltage: 3V DC Current consumption: 0.5mA (maximum) Operating voltage range: 1~10V DC Impedance: 2.2Ω (maximum) Sensitivity: 60 dB + 2 dB Speaker: Speaker impedance: 150 + 15% ohm Speaker sensitivity: 130dB Speaker frequency range: 20-20KHz Speaker effective test range frequency: 30-5000Hz Speaker distortion rate: less than 5% Speaker rated power: 10 mW Speaker maximum power: 15mW Specification: suitable for ICOM M33 T60B Package List: 1 x Two Way Radio Headset