Before choosing the GPS receiver that fits you, you have to look for the connectivity type, the number of channels it tracks at a time, the update position frequency as well as the accuracy.

The HOLUX GPSlim240 Bluetooth GPS receiver is a fully integrated GPS receiver. It includes a rechargeable Lithium-Ion battery, GPS antenna and Bluetooth connectivity. It also incorporates a third-generation chipset designed by America’s SiRF Technology for low power consumption and this technology has proven itself. All features are fully integrated into one unit to meet the
rigorous demands of consumer’s professional and personal needs. GPSlim240 is a dual-function GPS receiver. Not only does it transmit satellite data through a PDA or notebook with Bluetooth interface, but it is also a traditional GPS receiver that can deliver a satellite signal through a data cable to a device without Bluetooth interface.
This device is compact, stylish and easy to carry and can be worn across the chest.

It meets a range of needs such as car navigation, security, mapping, surveying, and agricultural applications. To use the device, all you need to do is to face the sky.

With low power consumption, GPSlim240 tracks 20 satellites at a time, re-acquires the satellite signal every tenth of a second and updates position data once a second. The power saving mode (Trickle-Power) allows the unit to operate a fraction of the time. It also provides a time and position fix function (Push-to-Fix) that will switch on the unit at a designated time, even when the receiver stays off.

Specifications

Tracks up to 20 satellites.
Receiver: L1, C/A code.
Update rate: 1 HZ(max)
Antenna Type: Built in Patch Antenna.
Minimum signal tracked: -159dBm
Dimension: 64 x 22 x 15 mm
Weight : < 35g
On/off switch: slide switcher
Lithium-ion battery lasts for more than 8 hours of use.
Operation Temperature: -10 0C to + 60 0C
Store Temperature: -20 0C to + 70 0C
Operation Humidity:5% to 95% No condensing
3 Led Function: Bluetooth , Navigation, Power