Easy, Lightweight and economical, the Ryze Tello is a fun drone for to start with-time flyers. Inspite of its finances cost tag, the Tello delivers lots: the battery delivered an affordable 13 minutes of flight time in testing, even though downward-facing light-weight sensors enable the Tello to hover in place https://www.aeroindustrial.com/product/d-rtk-2-estacion-gnss-de-alta-precision/