I can appreciate the testing methods for new receivers by SenderoGroup. The GlobalSat 338 bluetooth receiver definitely has a few disadvantages. Like a lot of other receivers, there is no audible or mechanical indication if the receiver is on or off. The "no bluetooth receiver detected" message from BrailleNote Gps helps to make sure I have turned the unit off after use. The case that comes with it is fair. It has a closed belt loop which means the case will not fit the loop on the strap that comes with the BrailleNote Gps. This could be a real inconvenience if one didn't carry a backpack or have some other means besides the strap to carry the receiver when walking. . I am sure there are probably more practical receivers out there! I will stick with this and my blue logger receiver for awhile. Below are some of the specifications I found on the buygpsnow.com website. General Chipset SiRF Star III Frequency L1, 1575.42 MHz Antenna Type Built-in Ceramic patch antenna Channels 20 channel all-in-view tracking Acquisition Time Reacquisition 0.1 sec., average Hot start 8 sec., average Warm start 38 sec., average Cold start 42 sec., average Accuracy Position 10 meters, 2D RMS (WAAS is not supported in SiRF Star III chipset) Velocity 0.1 m/s Debra