The invention provides a multifunctional
remote control computer antitheft alarm mainly comprising a remote controller and a host. The remote controller comprises an LED, a transmitting circuit, a single-
chip microcomputer, a
voltage stabilizing circuit, four micro-switches (S1, S2, S3, S4), an Q1 field-effect tube, a C1, R1
delay circuit and a power source. The host comprises a
microcomputer, a computer start switch, a
limit switch, a code matching switch, a
vibration sensor, a piezoelectric
buzzer, a drive circuit, a voice
chip, a
lithium battery, a
lithium battery charging management
chip, a power source input port, a bleeder circuit 2, a receiving circuit, a duel track electronic volume adjusting chip, an audio input port, an audio output port, a power source detection port, a bleeder circuit 1 and a trigger port. The multifunctional
remote control computer antitheft alarm has multiple functions of computer antitheft alarm,
remote control of locking and unlocking of a computer, remote control of instant start, instant shutdown, timed start, timed shutdown and timed cycle of a computer, remote control of the volume of a computer, remote control of defense arranging and removing, automatic defense arranging, automatic sleep for saving power and voice prompt, and can be widely applied to computers.