This is a like new used, never abused texas Star 500V CB radio Linear Amplifier. It is like new, I may have the box. It has been tuned by a Class 3 Motorola technician. It is in perfect condition and is a barn burner. The technician biased this unit for two watts and slightly limited the power output for unit longevity, best modulation and a clean signal. I am buying a HAM linear to replace this one. I have had this unit for about 6 mo. It has very low use. I prefer to sell it in person and you are welcome to try it out with me before you buy it. Shipping additional and no returns.