?The Review:http://www.rcgroups.com/forums/showthread.php?t=1765950                                    Features            4 channels function provide stable flying and easy operationThe powerful 3.7V£¬ 250mAh Li-polymer battery pack is with charging protection circuitNo need to trim and fly more stablyHigh capacity battery and strong power moter enable the helicopter to fly much longer and more powerfulUSB cable makes charging more convenientThe double propellers makes the stable flying and operation                                                            Specifications            Tail Blade Diameter    2.17 " / 55 mm    <br>Channel    4    <br>Body Material    ABS    <br>Control Mode    2.4GHZ Remote Control    <br>Weight    22.19 oz / 629 g    <br>Color    Silver Gray    <br>Remote Distance    30meters    <br>Battery    3.7V 350mAh    <br>Flight Time    About 10minutes    <br>Charging Time    About 50 minutes    <br>Dimensions    ( 16.5 x 16.5 x 3 )cm / ( 6.50 x 6.50 x 1.18 )" (L x W x H)    <br>Remote Control Battery    6 x 1.5V AA Batteries(not included)    <br>Model    HCW 553    <br>Suitable for    15 years old age above    <br>                                                            Package Includes            1 x 2.4GHz Transmitter 4Channel Quadcopter1 x Transmitter1 x User Manual4 x Tail Rotor1 x USB Calbe(64cm)1 x 3.7V 350mAh Li-polymer Battery