Product Diagram

Bluetooth
master
AB5365A
26M
LTK5129
Button definition
function
Charge
management
chip 4054
connect
bluetooth
instruct
charging indication
Lithium battery 3.7V - power
supply main control and
power amplifier
AUX
audio
input
USB5V
input
Speaker block diagram
TF
input
Lithium battery
protection chip
Microphone
audio call
Horn
antenna
Crystal
audio input
Amplifier
2402-2480MHz