2*30W class D amplifier board 12V-24V 

 MP3 player recording plush toy
voice recording bear

LED digital quran speaker with remote for muslim

High output 5W stereo recording plush doll OEM

30-60s recoring toy music box

 3 channels bluetooth audio receiver amplifier board

2 X 150Watt Class-D Audio Amplifier Board

4ohm 12V 15W mono FM radio amplifier board

class D bluetooth amplifier 2*15W MAX98400A

RC-BC02 small size metal bone conduction transducer

AC110-220V waterproof 3W stereo bluetooth amplifier

 surface sound exciters 8ohm 10W diameter 44mm