SUPERIOR STRENGTH LOCKING SYSTEM – This laptop and notebook combination lock security cable is designed keep your precious and expensive on lock so no one can take your belongings. Leave your device at your desk so with the peace of mind that your product is protected. Many of our customers are students in dorm rooms that fasten the security lock cable to their desk and can leave the dorm without their laptop. COMBINATION LOCK WITH 4 DIGIT PASSWORD – The laptop security cable utilizes a 4 digit security code. This customizeable combination allows you to have over 10,000 different and unique combination. You are able to change the combination with ease. The cable wraps around your desk or a secure object and connects to built in security locking slot holes. Please be aware that this is not compatible with devices that do not have a built in security locking hole. PUSH BUTTON UNLOCKING MECHANISM – Once you have your device set up, it is incredibly easy to unlock the device and take it with you. Our technology has allowed us to manufacture this security lock so that you can unlock the device with one hand to easily take out and take your note book with you on the go. Attach this to not only your laptop but also netbooks, LCD screens, plasma screens, TVs, projectors and other devices with a security slot. NOT COMPATIBLE WITH CERTAIN MODELS – This security cable is for products with security slots. Unfortunately security slots do not come standard on all products. The following devices are not compatible with this product: [Lenovo]U41 / U31 / M41 / S41 / K41 / Ideapad series of products / Flex3 series of products [Acer] Aspire V Nitro [Dell]SPX13 / 7000 / M3800 / Alienware / Inspiron with square keyhole SATISFACTION GUARANTEED – Your satisfaction is 100% guaranteed. We offer a 30-day money-back guarantee and a 12-month warranty on all products. Phone, email, and live chat available on our website!