With ultra light weight and strong body frame￡? easy to fly and resists crashes. It can fly both indoor and outdoor in gentle wind condition. Adopted the latest 6-Axis gyro technology.Besides usual flying movements￡? the U816 is able to perform 3D rolling action!! Even in a limited area￡? it flies and rolls well. Just press a button! Adopts 2.4GHz Radio transmission system. So that more than one aircraft can fly together at the same time￡? with nearly zero interference.                                    Features            With Gyro ( It can make direction-sense more sensitive and fly stable)2.4Ghz 4 Channel Transmiiter with LCD Screen display360 Degree Eversion ButtonSmooth hang performance(for gyro version)Newly designed electricity saving functionSafeguard battery model to prolong the uses lifeFunction: 4-Channel with three axis gyroscope￡? ascend/descend ￡? forward/ backward￡? left and right￡? sideward flight￡? steering￡? hover￡?3D tumbling action                                                            Specifications            Main Rotor Diameter    5.5cm / 2.17&acute;&acute;    <br>Item NO.    U816    <br>Materials    ABS    <br>Packing Dimensions    ( 33 x 23.5 x 8.5 )cm / ( 12.99 x 9.25 x 3.35 )" (L x W x H)    <br>Color    Orange    <br>Function    4CH with 6 axis gyro: up￡? down￡? forward￡? backward￡? left and right side fly    <br>Flying Time    about 7 minutes    <br>Charging Time    50 minutes    <br>Remote Control    2.4G LCD remote control    <br>Remote Distance (m)    100 - 150 meters    <br>Driving Motor Quantity    4 PCS    <br>Power    3.7 V 240mAh Lipo Battery    <br>Dimensions    ( 10 x 10 x 2.7 )cm / ( 3.94 x 3.94 x 1.06 )" (W x L x H)    <br>Channel    4    <br>Remote Control Battery    4 x 1.5 V Acidity (not included)    <br>Weight    620g / 21.87oz    <br>                                                            Package Includes            1 x 4CH 6 axis gyroRC Quadcopter1 x 2.4G LCD Transmitter2 x 3.7v 240mAh lipo battery1 x Charger box4 x Propellers1 x USB Cable (67cm) 1 x Users Manual                                                             Extra Info            You can click the following photos and select suitable accessories￡? if necessary.            <br>Accessories: Click the picture below to find what you may need. *RC model helicopter is not toy and is not suitalble for children under 14 years￡?Keep it away from children.*Carefully read the instruction before any use￡?if you are beginner￡?its advisable to be assisted by an experienced helicopter pilot.