ITEM NAME:sr3100 2.4ghz dsm2 3-channel surface receiver for dx3r dx2e transmitter Z a.imagelink a:hover.imagelink {color:#db3606;.Modulation: DSM2. 1x DSM2 Compatible 3CH Surface Receiver. With the receiver off, insert the Bind plug into the Batt/Bind port in the receiver. Power the receiver. The amber LED will flash continuously, indicating the receiver is in Bind mode.