Features: Material: ABS Plastic Light Color: Blue / Yellow Size: As shown in picture Connection: Red-Positive, Black-Ground Voltage: DC 12V Universal for most motorcycles with 10 mm screw holes No ERMASPEED LOGO Packaging: 4pcs x Motorcycle Turn Signal Lights Connection: Red-Positive, Black-Negative. Please choose a resistor to light them with added safety. Tip: Soft rubber and ABS plastic AMBction, please don't fold strongly After receiving the goods, don't rush to install it, first use a 12V DC fully charged BATTERY to test it directly, which can save you a lot of trouble and worries. (DON'T USE VOLTAGE TEST OVER 12V!!! It is easy to damage.) Note: If some of the LED lights are off or the turn signal is not working properly. Please check that your wiring is correct. (If the original Motorcycle RELAY does not support the LED, the RELAY needs to be replaced) If your motorcycle came factory with LED blinkers, the indicators just plug and play; If not, a flasher or resistor is needed to make these work. Slight overflow of glue is a normal phenomenon and does not affect the function of the product. Perfectionists buy carefully!