High-Performance & Certified SafetyThis 170W AC Adapter delivers stable 20V/8.5A output with 100-240V universal input, perfect for Legion/P-series gaming/engineering laptops. overheat/short-circuit protection ensures ultra-safe charging for your ThinkPad X1 Extreme Gen 4. GERVGHS 170W AC Charger Compatible with Lenovo 170w charger works seamlessly with ThinkPad P1/X1 Extreme Gen1-6Legion 7/5 Pro, T/P/W-series, and all models requiring 170W/135W square tip