The Lenovo GX20Z46307 230W AC Power Adapter in black is a tested and working unit designed for Lenovo laptops. With a voltage of 20V and an output current of 19.16 Amps, this power adapter is compatible with models such as Lenovo ThinkPad T560 and IdeaPad 5. Made in China, it is a reliable accessory for Lenovo users seeking a high-quality power source for their devices. Additionally, it comes with a California Prop 65 Warning regarding potential health risks associated with the product.