D2 Racing air spacers allow adjustment through both the bottom bracket and the inflatable sleeve or dual bellows air bellows which allows for the ultimate range of ride height adjustment. Each air shock features an adjustable 36-position damping design for fine-tuning ride quality and responsiveness. Evo Bluetooth management enables vehicle operation, via the included RF remote or via our free iOS or Android app. Tri-sensor digital gauge allows easy access to vital air pressure information (front, rear and reservoir) with LCD display, user-defined font and background colors, high/low alerts pressure and voltmeter. Includes all parts needed for complete air suspension installation when paired with D2 air struts. Kit includes : DUAL ELECTRONIC SWITCHES WITH THREE GAUGES FREE SMARTPHONE APP 4 SOLENOID VALVE BLOCK THREE PRESSURE SENSORS FOUR BUTTON RF REMOTE CONTROL (FORWARD UP, FORWARD LOW, BACKUP, BACKDOWN) WITH 150 RANGE PI 4 GALLON SPECIALTY BRUSHED ALUMINUM SUSPENSION SEAMLESS TANK WITH CHROME VIAIR 444C SKIRTING SMC WATER TRAP 60' AIR LINE DOT 1/4" PRESSURE SWITCH 150-175 PSI ALL FITTINGS, POWER WIRES AND PLUG REQUIRED D2 Racing air struts allow adjustment through both the bottom bracket and inflatable sleeve or dual bellows air bellows which allows for the ultimate range of ride height adjustment Each air shock features a design Adjustable 36-position damping for fine-tuning ride quality and responsiveness.The AccuAir e+ Connect Pressure is the latest generation on of AccuAir Controller, which lets you control your suspension via the e+ app or TouchPad Controller (sold separately) with three presets. The pressure-based system allows for simple installation and greater reliability on height sensor kits. Includes 5.0 Bluetooth for the highest level of stability/range, over-the-air updates, RGB backlighting with user-customizable color, and ride-height start. Kit includes : E+ CONNECT WITH UPGRADE PRESSURE+ VERA 4 CORNER MANIFOLD (8 VALVES) 4 GALLON SPECIALTY BRUSHED ALUMINUM SUSPENSION SEAMLESS TANK WITH CHROME VIAIR 444C BASEPLATE (ADD SECOND COMPRESSOR WITH WIRING HARNESS AND FITTINGS FOR $280 MSRP) SMC WATER TRAP 60' AIR LINE DOT 1/4" ALL NECESSARY FITTINGS, POWER CABLES AND OUTLETS