I need to design and manufacture a new product. There are two parts, the transmitter and the receiver. The transmitter must have 400m range, be powered by a 12v DC car battery, can plugged in a car, operates on a unique sequence and when the car starts the transmitter must be always On. The receiver must be powered by AC and when it gets signal from the transmitter it's work is to turn on a lamb. Both the transmitter and the receiver must be as small as possible with at least 5 years life time, capable for mass production and cost no more than 5 USD. The electronic circuit plan is necessary.