When adding a power supply to any vehicle design options of the power supply should be priority, with Whelen power supplies you get the best options and premier quality. Whelen has added ScanLock to their power supplies. Scanlock™ is a revolutionary design feature that allows you to cycle through 10 flash patterns and lock in the one you want. The flash patterns available are: CometFlash, DoubleFlash, Rapid Rate, Triple Flash, Micro-Burst II, Micro-Burst III, Modu-Flash, Action Flash, Long Burst, Action Scan. This kit comes standard with Whelen's 6 outlet 90 watt power supply, 4 amber strobes each with 15' of cable for installation.