Product Name: 4-Channel Transmitter R/C HelicopterModel Number: REH4C5-4Place of Origin: ChinaThe R/C helicopter-hm5#4 is a high performance ready-to-fly electric helicopter for indoors and / or outdoors on calm days. At about 235 grams, the R/C helicopter will for 10-15 minutes on the 7.4V 800mah Li-ion battery, depending on the type of fight. The R/C helicopter is not difficult to operate. Specifications: 1) Main rotor diameter: approx. 340mm 2) Tail rotor diameter: approx. 340mm 3) Overall length: approx. 425mm 4) Overall height: approx. 175mm 5) All-up weight: approx. 235g (battery included） 6) Driven system: 2 x 180 carbon brush motor 7) Battery: Li-polymer 7.4V 800mAh 8) Package included: a) Coaxial structure b) 4-ch transmitter, 3-in-1 receiver c) 2 x 180 carbon brush motor d) 2 x 7.6g servos outside e) Easy to control and stable to fly, optimum for the beginner f) Charger out 9V1000mA g) Battery 7.4V 800mAh h) Main rotor blade A i) Main rotor blade B j) Small axis k) Hollow axis Outer packing: 6pcs/ctn