Instruction: Power +4.5V DC.

Function: Press "REC" key, then sound a "duoduo" and start to radio, then finish the radio, the sound "duoduo" would be run out, then you could press " play " key, all of the contect of the radio can push out, when it finish, there will be builted prestore(foreordainion) music running out, meanwhile the light will be shining on and off.