No Driver Needed: Works right out of the box, provides instant access for Windows computers. Tasks such as login, sign in or unlock can be accomplished with a Press of a finger, no need to remember usernames and passwords Up to 5 Fingerprint Registration: Allow family members, close friends, or colleagues to gain access to a single computer. 360° all direction fingerprint registering for better accuracy and faster response. Paralleled Software Support: With Smart ID Encryption, encrypting your files has never been so easy. You can specify a folder as an encrypted zone, once a file is copied into the folder, it'll automatically be encrypted. Gets Smarter Over Time: With each fingerprint registry, the scanned data is added to the profile of the enrolled finger. So, the more you use it, the more accurate it gets. Allowing faster access. All You Need in a Nano Formfactor: Small and lightweight, takes up no space. Drop it in your pocket and you wouldn't even notice a thing. Specification: Store Up to 5 individual fingerprints Note: Not compatible with Mac OS or Chrome OS size:20.6 x 17 x 12 mm Material:metal colour:Silver Package Contents: 3 x Nano USB Fingerprint Reader Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.