User's Manual

Principle of operation
• This product use 433.92MHZ high-frequency RF technology scheme.
The electrocircuit include transmit antenna, self-oscillating, MCU,
button circuit, Status direction, audio-frequency signal enlarge
commutate and Voltage-stabilizing circuit.
• Main control chip via button scan identify to make the instruction in digital
analysis process. Or collect the analog signals by MIC to enlarge through
filtering. Then input to audio-frequency chip, couple and enlarge by
capacitance and commutate by diode to transfer the analog signals to digital
signals by internal A/D. Output to corresponding coded signal after
operation.
Coded signal will be mixing to load to high frequency INM-LO. Through
transmitting loop to send to ambient environment by antenna. So as to
control the receiving action.