Please note these are Brand new Synaptics Touchpads and fully tested. if you have issues with Touchpad then it will be a driver issue, please make sure you download and install the correct drivers. Drive download: driverdl.lenovo.com.cn/think/download/driver/7448/UltraNav[n10gx25w].exe download.lenovo.com/pccbbs/mobiles/jbg215ww.exe Please install the driver before used: Synaptics touchpad driver 18.0.7.57 from ThinkPad website. Manufacturer Part Number(s): 8SSM10G93373E1TJ5BKJ6SC, CDEA004 00C Dimension (Length x Width): 100 x 75 mm / 4.3 x 3.5 x 0.2 inch Condition: Original and new condition without original box shipping Reference list of compatible with Laptop models: - S3 Yoga Touch - S5 Yoga - S5 Yoga Touch - Thinkpad L440 - Thinkpad L450 - Thinkpad L540 - Thinkpad T431S - Thinkpad T440 - Thinkpad T440P - Thinkpad T440s - Thinkpad T450 - Thinkpad T450P - Thinkpad T450s - Thinkpad T540P - Thinkpad T550 - Thinkpad W540 - Thinkpad W550s - Thinkpad X1 Carbon Gen 2 - Thinkpad X1 Carbon 2014 - X1 Carbon 3rd 2015 - Thinkpad E445 - Thinkpad E450 - Thinkpad E450C - Thinkpad E455 - Thinkpad E531 - Thinkpad E535 - Thinkpad E540 - Thinkpad E550 - Thinkpad E555 - Thinkpad E560 What's in the Box 1x Touchpad Mouse Board (NO Flex Cable) (Black)