Price is for 1 x3mm LEDs made Slot Cars SignalsSteady Green / Flashing Yellow / Steady Red for HO Gauge layouts Not includs the circuit boardBut you may Click Here to buy themOperating Voltage = 1.8V to 2.4VOperating Current = 18mA to 20mAwill come with resistors for 12V or 16V use CharacteristicPrice is for 4 unitsSize for each : check from the photosfor HO scale slot cars layoutthe signal head is made from PlasticBrand newPRODUCT DESCRIPTION Your Slot cars layout will be more lively with these items.Perfect for Slot Cars Scene, etc......