Product Description: Input:100-240V 2.5A 50-60Hz Output:20V 8.5A 170W Connecter size: USB Rectangular shape(pin) Compatible with ThinkPad 11e Series, 11e 1st Gen (AMD Windows), 11e 1st Gen (Chromebook), 11e 1st Gen (Intel Windows), 11e 2nd Generation (Intel Windows) E Series- E440, E450, E455, E540, E550, E550c, E555 L Series- L450, Multimode- ThinkPad Helix (1st Gen) S Series- S431, S440, S531, S540 T Series- T431s, T440, T440p, T440s, T450, T450s, T540p, T550 P Series- P50 P51 P70 X Series- 11e, X1 Carbon (3rd Gen), X240, X240s, X250 W Series- W540, W550s Yoga- Yoga 12 (S1), Yoga 14 (S3), Yoga 15 (S5) IdeaPad Y40-70 Y50-70 Y50-70AM-IFI Y70-70 Y700 Z710