The Universal Audio Apollo X4 (Heritage Edition) High-quality Thunderbolt audio interface designed for home recording. With four mic inputs and line inputs, this interface allows for a total of eight channels of audio. Perfect for musicians and producers looking for a versatile and professional solution for their recording setup, the Apollo X4 offers exceptional sound quality and functionality. Built by the renowned brand Universal Audio, this interface is sure to meet the needs of any home recording studio. This is the Heritage Edition. Used in mint condition, very light use.