As the unit will often grab back the call if you are within 30-40 feet of the car! Its remarkable what you can get for $14. Working fine now. I will post after pics if yall interested. These are awesome I work in a call center & prefer my 305 over the centers peripherals. The instructions are clear but the print is small but i think thats because it is also in another language. Its not up there with the very best of mics but then nor is the price. 8/5 but my personal satisfaction on it gets a 5/5. The writing bled a bit (but could very well have been me being left handed).