it can fit in the palm of your hand
No. You would need a separate GPS receiver and GPS software (i.e. TomTom) on your palm device to decipher the GPS receiver's signal into information you can use.
An American penny is round while GPS receiver chips are not circular in shape. They come in different sizes. There is actually a very small GPS receiver chip that is the size of a baby's fingernail. In comparison, that is smaller than a US penny.
There are several GPS receiver modules available on Amazon.com. The Globalsat BT-359 - GPS receiver module has excellent reviews and cheapest price for the quality. You can find a link here: http://www.amazon.com/Globalsat-BT-359-GPS-receiver-module/dp/B000GWGHOK
A GPS receiver gets its signal from a network of satellites orbiting the Earth. These satellites continuously transmit signals that the GPS receiver uses to calculate its position and determine accurate time information. By receiving signals from multiple satellites, the GPS receiver can triangulate its position with high precision.
For a Garmin Etrex GPS system, a receiver is not required. You can simply just buy a Garmin Etrex GPS and use it without having to buy any other accessories such as the receiver.
It depends on what brand of gps you own, and the model fo the gps system which you have to purchase the receiver antenna for; each model will have different costs.
No, the AmbiCom GPS receiver requires a Windows PC to be operational. It is not compatible with other GPS devices.
A Humminbird GPS receiver is a brand of GPS device and other things. Here is a link to their website if you would like to learn more. http://www.humminbird.com/
According to most reviews and ratings by customers and experts, a GPS receiver is a better buy than a GPS cradle. This is true not only for quality but for the price difference as well.
Yes, a gps device will usually come with one usb receiver for you to be able to charge it from various locations. but you can purcahse a usb receiver seperately.
No
Yes you will need to purchase the GPS USB receiver separately. The USB GPS is used primarily on laptops and computers. Read more information here: http://www.bestbrandtobuy.com/usb-gps-receiver/