QK5SL210027RC Mini Racer

Warning : Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user authority to operate the equipment. NOTE : This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: … Reorient or relocate the receiving antenna. … Increase the separation between the equipment and receiver. … Connect the equipment into an outlet on a circuit different from that to which the receiver is needed. … Consult the dealer or an experienced radio/TV technician for help.

Operation Description of transmitter for RC Mini Car The transmitter for remote control toy car operates at 27.145 MHz which is controlled by a crystal. It is powered two 1.5 V AA size batteries. It has an ON/OFF switch, and there are four main buttons to control forward, backward, left and right movement. It also has a charging terminal on the EUT for charging the toy car. Refer to the circuit design, the circuit description is listed as follows : - IC1 and associated circuit act as encoding - Q5, Q6 and associated circuit act as modulation - X1, Q2 and associated circuit act as oscillation and amplification