Review on GPS collar GMW TK909-GMW, neck circumference 30-55 cm, 1 pc., red by Felicja Lewandowska ᠌

Positioning accuracy is declared 5 meters. In practice, it happens only in open areas (wide streets and squares) and no more than 5% of the observation time. The rest of the time, the accuracy is 30-100 meters. In a densely built-up area and in a forest, the accuracy is approximately 100-300 meters. And indoors it drops to 500-1000 meters. Although the smartphone is positioned even indoors with an accuracy of about 10-20 meters. However, 50-100 meters on the street is more or less enough. This distance is "two to four pillars". You can already see the dog. The application is inconvenient (interface), but you can endure it. The card is very slow. Although the readings are ated with the maximum frequency, they change on the map at two to three minute intervals. For a very long time, the mark of the smartphone and the relative position of the smartphone and the tracker do not appear on the map. Most of the application is in English. The purpose of many switches and icons is generally unclear. For example, "many cars" / "one car" / "person". You switch, but nothing changes on the map. Haven't found the user manual yet. Please note: the instructions for the tracker say that the device does not work with TELE2, Tinkoff and YOTA SIM cards. The description of the collar says "the length of the collar is universal and adjustable from 55 cm to 24 cm" In practice, it turned out that the part of the collar in which the luminous strip (plastic light guide) is threaded does not fit into the eyes of the GPS tracker by any means. As a result, the collar can be made at least 48.5 cm. If you need to do less, you will either have to completely remove the light module from the collar (refuse to use it), or cut its "tail" to the desired length. The collar buckles hold the length very tight if you pull hard. But when the dog is regularly brushed off, the length of the collar gradually increases. For an hour walk, about 1 cm. So if the dog runs with him all day, then the collar will surely lose. Something needs to be done to prevent relaxation.