Fits most laptops. Can be set for 19-20V DC Input: 100 – 230 V ~ 50/60 Hz 1.1 A Maximum output current: 4.5-4.7 A Note: If the wattage of your laptop is lower than 90W (Watts) this will not harm your computer, the computer only takes the amount it needs. This means that if your computer only requires 45W (Watts), both 90W and 120W will work. However, if your computer requires 100W, a 90W will not be powerful enough. It is only if you connect a 19V (Volt) adapter to a 15V (Volt) that you risk damaging the computer. Note: Also be sure to measure your connector so it fits. Connectors included (model + outer/inner diameter): K1: 6.3 x 3.0 mm K2H: 5.5 x 2.5 mm K3: 5.5 x 2.1 mm K4: 4.8 x 1.7 mm K5: 4.0 x 1.7 mm K6: 3.5 x 1.35 mm K9D: 2.5 x 0.7 mm K10H: 4.0 x 1.35 mm K12: 3.0 x 1.1 mm K13: 3.5 x 1.0 mm K14: 2.5 x 0.8 mm K15D: 6.0 x 4.4 mm K16: Lenovo Slim Tip K17: 5.5 x 1.7 mm K18: 7.4 x 5.0 mm