The Kone Air wireless ergonomic gaming mouse offers gamers maximum flexibility for both work and play. The 2.4 GHz Stellar Wireless connection ensures a lag-free gaming experience, and the Bluetooth mode enables productivity with lower power consumption on the go. Two AA alkaline batteries ensure maximum battery life, and only one battery is also possible for reduced weight. The ergonomic Kone shape, perfected over years of fine-tuning, ensures comfort of use even during the most intense gaming sessions. With ample palm space and durable double-layer rubber side grips, the feel of the Kone Air is simply unmistakable - ergonomic perfection. The multi-button design is enhanced by Easy-Shift[+] button duplication technology, which opens up a total of 17 programmable input options for the 9 buttons, so you can easily perform macros and actions. Just hold down the programmable Easy-Shift[+] button for access to the full arsenal of secondary functions. The Kone Air is packed with a variety of proprietary ROCCAT technologies for maximum gaming performance. ROCCAT's Titan button switches combine with the Owl-Eye Optical Sensor with 19,000 DPI to deliver unparalleled levels of speed, precision and responsiveness. Gaming-grade 2.4 GHz Stellar wireless connection or Bluetooth connectivity. Up to 800 hours. Compatible with 1 or 2 AA batteries. Ergonomic shape with double-layer rubber side grips. 17 programmable input options. ROCCAT Titan Optical key switches with a product life of 100 million clicks. Owl-Eye optical sensor with 19,000 DPI.