Spektrum X-Plus technology is perfect for scale modellers who want the option to expand a models functions without having to buy a new receiver when they do. With the X-Plus module you can instantly add eight extra channels to any Spektrum DSMX receiver with X-Plus technology. Just plug it into the receivers SRXL port. A DSMX transmitter with X-Plus software is required to assign the extra functions to specific switches.The X-Plus 8 module is designed to allow expansion of up to 8 servos for non-control surface functions such as bomb drops, lights, winches, retractable landing gear, and many more. The X-Plus 8 is compatible with Spektrum X-Plus transmitters and receivers. The X-Plus 8 module offers the option to power the connected servos via dual auxiliary battery ports with separate batteries and switch harnesses (sold separately) independent of the receiver. The X-Plus 8 module can also be powered inclusive of the receiver by using the included jumper through either of the dual BATT/JMPR ports.