1. Blue nixie tube display screen.
2. USB / SD mode: short press to play pause key / FM radio mode: short press to auto search station.
3. BT / USB / SD mode: short press for the previous song, long press for volume reduction. / FM radio mode: short press for the previous one, long press for volume reduction. / aux mode: long press for volume reduction.
4. BT / USB / SD mode: short press for the next song, long press for volume plus / FM radio mode: short press for the next one, long press for volume plus / aux mode: long press for volume plus.
5. Rec recording key:
Press this key for a long time in USB / SD mode to record the input audio of MIC port,
Press this key for a long time in aux mode to record the input audio of aux port,
Press this key for a long time in FM mode to record FM audio,
The duration of recording depends on the capacity of the U disk or SD card used;
When playing the music u disk with recording file, short press this key to quickly switch to the recording file playing, which is convenient for users to quickly find the recording file.
(when aux, USB / SD and FM are working, if any device of USB flash disk and SD is pl ed in, long press rec key for 2 seconds to start recording. In the process of recording, short press rec key to end recording and play back the content just recorded; If the user is listening to the music in U / SD, the user can quickly switch to play the recording file by pressing the record key. If the user does not want to hear the current recording file, the user can clear the current rec recording file by pressing the mode key for 2 seconds. Please note that the content you do not want should be deleted.)
6. USB / SD boot default to full disc cycle, press this key to switch to single cycle.
7. Mode key: short press to switch between Aux / USB / SD / BT / FM modes. / when playing the recording file, long press this key to delete the currently playing recording file.
8. EQ key: when playing USB / SD music, press this key to switch between the five EQ effects.
9. Receiver head.
10. U disk socket, support dual lossless format decoding, ape, FLAC, wma, WAV, MP3, etc.
11. SD card socket, support dual lossless format decoding, ape, FLAC, wma, WAV, MP3, etc.
Bluetooth Name: bluetouch
Support 32g memory card or 64g memory card
The volume is divided into 30 levels
1. Digital ground and analog ground: (the ground wire is connected when the independent transformer winding supplies power) and (the ground wire is separated when the battery box is applied).
2. Motherboard power interface 5V, (note that the positive and negative poles are not reversed).
3. Left and right channel audio output.
4. Aux external signal input.
5. 12V battery power display interface: (when the detection voltage is lower than 5.8v, the battery symbol is not on, the first grid of 5.8v-9.5v flashes, the first grid of 9.5v-10.5v is always on, the second grid of 10.5v-11.5v is always on, and the third grid of 11.5V or above indicates full power. Note that the current design maximum detection voltage should not exceed 22V); When the battery is lower than 8.5V, the machine will prompt the user to charge the battery, which can protect the battery. When the battery is lower than 8.5V, the system will automatically display undervoltage and stop working. If the product is not applied to the battery detection port, the system will work by default
6. FM radio antenna interface.
7. Mic recording port.
8. Operation function key and remote control head external interface mode key: short press to switch between Aux / USB / SD / BT / FM modes. / long press to delete the current playing recording file when playing the recording file.