Basically antennas are calibrated wires that collect a wireless signal. They are passive devices that do not require input power from the computer or wall charger. A transceiver is an active device that has a receiver and a transmitter and requires a power source. All Wi-Fi systems are transceivers. Our transceivers amplify both the received and transmitted signals, and are available in 500 milliwatts, 1000mW and 2000mW, while an AirPort Extreme card is only 30mW. The receiver section is a low noise amplifier. It takes the RF coming in from the antenna and amplifies it, sending it to the AirPort card. So, you get a more sensitive receiver and higher power transmitter in one product. That’s why the QuickerTek Transceiver significantly extends the range of all PowerBook and desktop Macs. That’s also why it goes through walls better, upstairs and downstairs. Transceivers are powered from the USB port or by the AC wall power supply. The QuickerTek Transceivers have LEDs to tell you what is