SG-F28 Function: 1.Infrared transmission and sensing 2.4CH: up/ down, forward/ backward, turn left/ right, lean left/ right 3.Altitude hold function 4.Obstacle avoidance function for anti-crash 5.With water-drop shape remote contol. Technical Information: 1.Charging time: 60-80 mins 2.Charging way: via USB cable 3.Operating time: 5-6 mins 1.Color box size:19.8*8.7*21cm 2.Carton size: 63*37.5*22.5cm 3.PCS/CTN:12pcs 4.G.W/N.W: 3.47/2.89kg 5.Qty of 20FT/40FT/40HQ: 6288/13068/15324pcs