GTX was a manufacturer like the current HID shops. Those over 40 years old might remember them. Specifications: 35W, 6000 Kelvin, for H4 bulbs. The light-emitting part has two points for low and high beams. The inverter boost section is Denso-made, a genuine Toyota part, manufactured in Japan. Dimensions: w=118mm x 110mm, h=20mm (25mm including wiring), with some margin of error. The wiring cords and other plating parts also seem to be fresh off the manufacturing line. This is an unused item that has never been powered on since purchase, but please consider it as junk since it's been over a decade since it was purchased. Those skilled in electronics may be able to use only the inverter at their own risk.