About this item Technical Details: Input: 100V-240V 50-60Hz; Output: 19V 65W; Connector Size: 5.5mm*2.5mm (Check Connector Picture Please!!!) Compatible with Portable Bluetooth Wireless Speakers: Works with various models of portable Bluetooth wireless speakers. Built-in IC Chip Protection: Our charger features an internal integrated chip for overheating, overcurrent, overvoltage, and overcharge protection to ensure safe charging. Dimensions: 9 x 4.7 x 1.9 inches.