This product is a lot of X 24 HP 45W 19.5V HSTNN-DA40 AC Power Adapters with blue tips. These power adapters are specifically designed for HP laptops and have a voltage of 19.5V and an output current of 2.31A, providing a maximum output power of 45W. They are compatible with various HP Pavilion and HP laptop models, and are manufactured in China. The black adapters are a reliable and efficient solution for powering your HP devices.