On top of that, it's unlocked and very compact. In testing around the San Francisco Bay Area, the MiFi 6620L performed very well, with excellent 4G LTE Internet speed. But all of that comes at a high price. The Jetpack costs $200, or $50 if you're willing to sign up for a two-year contract.
Rays account for about half of all elasmobranch species. Of the 500 or more described ray species, there are over 150 stingray species that are assigned to approximately 20 genera. Freshwater stingrays of the family Potamotrygonidae are assigned to the genera Paratrygon, Plesiotrygon, Heliotrygon and Potamotrygon.
The stingrays are a large suborder of the rays. They are cartilaginous fishes related to sharks. They are classified in the suborder Myliobatoidei of the order Myliobatiformes, and consist of eight families. Most stingrays have one or more barbed stings on the tail, which is used only for self-defense. The sting may reach about 35 cm, and its underside has two grooves with venom glands.