HH-007 car amplifier, high quality sound, can read U disk and SD card ... 4, the proposed load of no more than 23W speaker 4-16 Europe 1 5, audio recording, press ... a maximum of 20 seconds was recorded, built-in microphone in the recording button pressed play. 1, when ... speaker 13, recording by recording the letter key, release button can be finished recording, record up to 20 seconds, built-in microphone ...