help with an idea

[SILVERPEN]

Hi, I need some help with an idea but have no idea if it is feesable. I  want a small battery operated transmitter
that will transmit a distance of about 200 feet.It has to have a micro switch. When switch is open it will transmit
a signal to a small receiver and a green lite will be on. When switch is closed a red lite and a sound (beeper,buzzer ) will be activated. The receiver has to be small, keychain small. Also I know nothing about electronics so is there someone or someplace that can I can hire to do this?
                                                                                                                           Thanks, Jerry

[audioguru]

The transmitter is transmitting all the time so its battery will not last long unless it is huge.
The receiver will be receiving all the time and will also need a huge battery unless you make it "sleep" most of the time then wake up for a moment when it tries to receive a signal then it sleeps again to save its battery power.

[Silent Jack]

The Xbee standard of wireless comms is designed to be very power efficient.  Though it sounds like you're trying to build a relatively simple security system.  There are a number of ways in which this could be accomplished.  Could you share some more specifics about your intention and wants?