Holux Mini Smart Mouse Type GPS Receiver GR-213U by Koolertron

Did not come with software disk. Other than that it works well

I have been using this Holux GR-213U USB GPS receiver for the past two years.I have found it to be of excellent production quality (Made in Taiwan), truly durable and waterproof as stated and has a convenient and strong magnet embedded in the base that allows it to adhere most any iron or steel surface.From a technical point of view, it contains the bullet-proof SiRF-Star III chipset specifically designed for receiving the US constellation of GPS Satellite signals. This is one of the best chipsets in the business -- no Russian GLONASS or Chinese GPS support in this chipset. Later models are based on a different chipset that supports both US and Russian satellites. However this unit works great!Driver software supplied emulates a serial port allowing compatibility with a huge range of GPS software.It also supports the industry standard NMEA (National Marine Electronics Association) command set for programming and additional functions can be invoked including the ZDA (1 pulse per second time signal). This also makes it useful for many purposes including serving as an accurate time source for many applications requiring time sync including Amateur radio JT65 and WSPR use.The package comes attractively boxed with all software on a mini CD ROM and adequate instructions plus some velcro and a suction cap to anchor down the lead in your application. I found that the driver was compatible with many 3rd party GPS programs supporting the NMEA protocol.LED flashes when sync is achieved, usually about 10 seconds after connecting to the computer.It does everything that I expect from a USB powered GPS unit.