The VEXnet Joystick is the most intuitive way to wirelessly control a VEX EDR robot. With a familiar layout inspired by video game controllers, the VEXnet Joystick features a 2-axis accelerometer, 8 face buttons, and 4 "trigger" buttons. Powered by AAA batteries or through the VEXnet Joystick Power Adapter. Have a lot of moving parts on your robot? Simply connect the Partner Joystick to the VEXnet Joystick using a Coiled Handset Cable and divide command between two separate operators! Great for building teamwork or for complex robots. NOTE:VEXnet Joystick and Partner Joystick contain the associated controllers ONLY. Six (6)AAA batteriesor apower adapterare required for operation, and aVEXnet Key 2.0is required for wireless communication.