7.4V 20W Power Amplifier Board with Bluetooth Recording Radio Decoder Board for Trolley Audio Motherboard Speaker Chargi

Description The Bluetooth pull rod power amplifier board is suitable for pull rod or single audio use or modification and it also has a microphone jack USB card Bluetooth radio recording Chinese voice broadcast microphone priority external AUX interface and other functions It can read TF card and U MP3 WAV WMA in the disk Sampling rate 8 48K code rate 8 320Kbps bit width 16bits music files Note It can be charged with a 9V charger and a 7 4V battery must be connected internally The plug size of the 9V charger is 4 0 1 7 small and the current is 2A Parameter Power 20WPeak value 35WUse charging DC 9V above 2A charger only supports lithium battery charging does not support lead acid battery charging Use lithium battery 7 4V 3A 6A lithium battery the machine needs to connect with lithium battery or external DC12V 3A 5A power supplySpeaker 4Ω 6 inch 8 inch 60 100 magnetic 20W 80WPanel size length 188mm x width 63mm x depth 36mm total depth 52mm including screw cap Installation hole distance 178mm x 52mmInstallation opening 163mm x 46mmWeight 0 14KGInstructions for use Recording instructions Need to insert U or TF card the length of recording depends on the memory capacity of U or TF card 1 In MUSIC mode short press REC to switch to MIC recording mode the screen displays REC At this time short press REC to start recording the screen displays the recording time and the recording device logo flashes 2 In LINEIN and FM mode short press the R