Character: . Perfect for railway layout and building! Made with led lights. These lamps are only suitable for 3V supply voltages. Do not use it directly on 12V or 16V to avoid damage to the LED. Also, please apply the correct working current of 20mA to each LED. Product Specifications:Condition: New. Scale: 1:160, suitable for N meter. Connection voltage: 3V DC or AC. Current: 20mA.Series resistors are included for connection up to 12-16V. If you have a 12-16V transformer, you need to switch the closed resistor to the power cord. Material: Metal.Light Source: LED. Age advice: not for children under 14 years old. Content: 5 pcs of tubes with us5 pcs of series resistors to connect to 12-16V. Other accessories in the picture are not included.