MP3 player bluetooth rearview mirror handsfree car kit 1,built-in speaker 2,One-Touch Answer. 3,fasion design 4,voice dial Model No. WD0603MP3 player bluetooth rearview mirror handsfree car kit Bluetooth car kit Speaker for Sun Visor 1. Compatible Bluetooth Specification V 2.1. Class2. 2. Operating Frequency Band: 2.4GHz ~ 2.48GHz. ED ISM band. 3. Support Multiple paired. (2 Bluetooth Phones can ...