Small, lightweight and easy to mount, the EA131 is designed to be used in conjunction with RD731, RD931 or RD1231 2.4GHz DSMj Receivers. Use of additional remote receivers, when installed correctly, can only help improve the robust quality of your JR/DSM RF link. Specification Type: Remote Receiver Modulation: DSMJ Band: 2.4GHz Dimensions: 6x21x26mm Weight: 3.5g Includes 150mm Remote Wire Extension