Check whether the output of the power amplifier is audible first, and then see whether the program task of timing programming is correct and whether the timing automatic function is turned off.

This bell ringer can support the ringing and playing of up to 32 audio file formats, can play music wav lossless, and has a powerful sorting operation of playing tracks, which can clean up invalid and repeated songs.

Microcomputer automatic bell ringer, suitable for school and work. , replacing the traditional annoying and harsh electric bell.