About this item Output: 19V 3.42A 65W. Compatible with 19V 2.37A 45W and 19V 2.1A 40W. Input: 100-240V ~ 1.5A 50/60Hz. DC Connector size: Internal Diameter: 1.7mm, External Diameter: 5.5mm, length: 4ft + 5.5ft. Compatible with a wide range of Acer Aspire models including A315-21, A315-51, E5-575, ES1-711, and various other models. Secure and Stable: our products include multiple safety mechanisms, including short circuit, overvoltage, overcurrent, and internal overheating protection. Charging does not harm the device. Dimensions: 7.87 x 4.8 x 1.81 inches.