Features: High frequency: 2.4GHz high frequency transmission, ensuring signal stability and no interferences. DSM2 technical support: supports DSM2 technology and provides full-Ranges receiving function. Lightweight and portable: the design is small and light, suitable for installation in aircraft of various size. Strong stability: stable signal transmission and accurate receiving performances ensure safety during flight. Drones enthusiasts: users who pursues a better flight experience and pay attention to the stability and accuracy of remote control aircraft. Specifications: Component:PCB Type: 4CH Modulation :DSM2 2,4GHz Band Voltages: 3.6-10V Size:Approx.29x16x7mm/1.14x0.63x0.27inch Note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item. Package includes: 1Pc 4100E Receiver 1Pc Bindstecker