The HE-MUMRK-6WA marker lights feature 16 self-controlled patterns with memory that can be synced with multiple units (of the same lighting model). They have both amber and white flashing LED lights for a powerful visual alert and are designed for higher voltage applications, working with both 12 and 24 volt systems. With a water-resistant IP65 rating, these marker lights are durable and built to withstand all weather conditions, year after year. The Municipality Series from Heise LED Lighting Systems enters a new category for government, construction and emergency vehicle lighting. These universal lights are designed for any fleet, commercial vehicle, or heavy equipment requiring a powerful visual alert. For those who operate at night, pair this series with the tried and true Heise Work Lights for the ultimate combination of safety and functionality. Product Specifications: Bi-color white and amber LEDs, 16 self-controlled patterns with memory that can be synced with multiple units (of the same lighting model), Input Voltage: 12-24V DC, IP Rating: IP65, Wattage: (6) 3-Watt LEDs, Size: L: 4.9", W: 1.1", H: 0.64".