This is Jomar Products Electric Model Servo Reverser with a Futaba-J connector. This goes in-line between your servo and your receiver. FEATURES: Works with AM, FM, PCM and 2.4GHz systems. Includes Y-Connector for use with two servos. Install in-line with any two servos, and one servo will move in the opposite direction of the other one. Works with 4 or 5 cells. Warranty: Electronic Model Systems guarantees this Jomar product to be free of defects in materials or workmanship for a period of one year from date of purchase. INCLUDES: One Servo Reverser with Futaba-J female connectors for two servo servos and one male Futaba-J connector for the receiver. REQUIRES: Receiver and servos. SPECS: Length: 1.75" Width: .5" Height: .25" Weight: .25 oz 8/18/01kzh ir/jl