Features: brand new and high quality brand new and high quality The flashing frequency of the turn signal can be adjusted, using advanced SMD technology, with automatic short-circuit for protection, automatic overload for protection, and reverse connection for protection, which can make the bulb work more stable. Waterproof design in solid-state efficient unit with no excess heat issue. It can eliminate the usage of load resistor, and operate with LED's or conventional bulbs at normal flash rate. It is speed adjustable. Clockwise to reduce the speed, anticlockwise to increase the speed. Easy plug and for play installation. Specifications: Material:Plastic Size:Approx.3x3.5x2cm/1.18x1.37x0.78inches Color: Black/Orange Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Relay Resistor