The newest version has been updated in 2015 Oct. The Updated version make easy Installation--One-click connection. More smooth operation and long battery lifeDescription: If youre sick of losing the USB receiver to your traditional wireless mouse, it`s time for you to go completely wireless with a Bluetooth 3.0 optical mouse. This mouse is fully compatible with all Bluetooth 3.0 or earlier computers, laptops, and other electronic devices.Its lightweight, slim design makes it perfectly for travel, and the lack of a cable or USB receiver to lose removes the risk of leaving your mouse nonfunctional. Instructions:1. Install with 2 AAA batteries and turn the mouse on.2. Turn on Bluetooth on your device and scan for detectable devices.3. Press the black button for pairing on the bottom, the red led light will get flashy and offers signal, then wait 3-5 seconds for the mouse to be matched. If no success, try more times.4. Select the mouse, pair and play.(Normally no code is required) If it asks you for a passcode (may happen to tablet only) Please try the password "0000" or "1234": Tonor is professional seller in selling mice,we offer Premium after-sale service.a. 12 months.b. 2 months hassle-free return policy.c. Seller pays for return if item is DOA or not as described.