Durable | Using high quality PCB board there are five |
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Keys | Call key mode key up key down key and on off |
Key | Support electronic switch control it will be on or off after long press on the on off key 2 3 |
Seconds | Support TF FM 3 5 input can control the external input |
Volume | The output port cannot be directly connected to the speaker but can be connected to the headset |
FM Decoder, Memory Card Input PCB Board Electronic Switch Control 5 Keys MP3 Decoder with Antenna for Headphone Review