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The 3rd Generation in wireless referee lights. *Free US Domestic Shipping* *Features* New & Improved User Interface Includes a 4th "Spare" Remote 24 hour battery life USB-C Remote Charging Haptic Feedback Battery % Monitoring Desync Event Notification Hard Shell Carrying Case Liftingcast Integration Flight Begins and Opener Change Clocks Attempt Selection Clocks The federation option dictates whether or not IPF infraction cards will be installed in the remotes (blue and yellow buttons).