New in boxes- boxes have been opened to check condition. Casper Rise adjustable base Split king Two Twin XL mattresses for true split-king operation (each side adjusts independently), or One standard king mattress with both sides synchronized. Key Features Independent head and foot articulation on each side Wireless remote control Preset positions including: Zero Gravity Anti-Snore Flat/Reset Adjustable leg heights Compatible with most foam and hybrid mattresses Can be used inside many existing bed frames or as a standalone base.