MP3-TF-16P MP3 SD Card Module with Serial Port Switch These are Metal Film Resistor

These are Metal Film Resistor with a value of 33k ohm 1/4W and tolerance of ±1%

Take battery signal sensor

relay drivers

It can effectively prevent the oxidation of the soldering head and increase the service life of the soldering head

MP3-TF-16P MP3 SD Card Module with Serial Port Switch These are Metal Film ResistorMP3 TF 16P MP3 Disk TF Card Module Serial Port is a compact and inexpensive MP3 module that can be connected directly to the speaker. Module with battery power supply, speaker, the keypad can be used alone, or through the serial port control, as the Arduino UNO or any microcontroller with a serial port module. The module's integrated hardware decodes MP3, WAV, WMA formats. While the software supports TF card drivers to support FAT16, FAT32 file