Bluetooth wireless technology makes hands-free operation comfortable and safe while driving - enjoy hands free calling with much more clear voice with HFP 1. 6 and browse files for your favorite songs with AVRCP 1. 4. Pioneers advanced sound retriever technology improves the sound quality of compressed media files like MP3, WMA files - this is done by enhancing high frequencies that tends to get lost in the compression process. Specially designed for India sound preference, Todoroki EQ realizes powerful bass and reproduces bright and clear high frequencies without compromising on vocals. - In-built Bluetooth for Handsfree calling and music playback - Audio Source: USB, Aux - 1 RCA for amplifier connection & Radio - Advanced sound retriever for a better listening experience - Tune your music with a 5 Band graphic equalizer.