This power adapter is designed for use with ASUS laptops and tablets, including the Zenbook UX21, UX21E, UX31E, UX32, and UX32E models. It has a 3mm connector and outputs 19V with a current of 2.37A. The charger is color black and is compatible with the OEM ASUS 45W ADP-45AW A adapter.This product is perfect for those in need of a replacement or spare charger for their ASUS device. It is compatible with the ASUS Transformer Book T300CHI, T200TA, and U Series, among others. The charger is a reliable and efficient way to power your device without worrying about the condition of the sold item.