In order to control the speed of your RC helicopter and make it fly perfectly￡? you will need our Walkera Master CP RC Helicopter Spart Parts HM-Master CP-Z-24 Speed Controller recommended here. The speed controller plays a significant role in driving and controlling motor to complete all kinds of instructions. It features compact appearance￡? light structure and stable performance to offer you high compatibility￡? reliability and stability. Easy to install and convenient to use￡? our speed controller deserves your attention!                                    Features             It is made of first-grade material that ensures the longevity of the product<br> With stable performance￡? it is practical and durable<br> Designed to repair and replace old or broken speed controller of Walkera Master CP RC helicopter<br> Compact￡? durable and convenient to carry<br> Easy to install and convenient to use<br> Reliable quality and high technical performance index<br> Play a significant role in driving and controlling motor to complete all kinds of instructions<br> Featured with compact appearance￡? light structure and stable performance<br> Excellent compatibility￡? reliability and stability<br> It is a best accessory for your RC helicopter<br>                                                            Specifications             Dimensions     (2.36 x 0.79 x 0.39)" / (6.0 x 2 x 1) cm (L x W x H)    <br> Weight     1.48 oz / 42 g     <br> Color     Balck     <br>                                                             Package Includes            1 x Speed Controller<br>