Features: 1. Ergonomic design. 2. Professional optical positioning technology. 3. Smart mini receiver, automatic connection. 4. Up to more than 16 million ID code designs. 5. Flexible 360 operating angle, up to 10 meters of control distance. 6. Unique intelligent circuit management design makes the mouse more power efficient. 7. 800-1600DPI Resolution adjustable frequency. 8. 300W clicking times available, Long service life time. 9. Adopt the latest infrared lighting technology. Specifications: Product: 2.4G ultra-thin wireless mouse Model: 3500L wireless mouse Weight: 48.6g Size: Approx. 10.2*6*1.5cm/4.02*2.36*0.59in Photoelectric resolution: 1200 DPI Interface: USB Color: Black Red Blue Optional Number of buttons: 4 Left and right keys Pulley (can be pressed) Key for changing the resolution(below the pulley) Battery: AAA Battery*2 (Not Included) Wireless transmission distance: 10m Wireless carrier frequency: 2402MHz-2480MHz Wireless working channel: 16 automatic frequency hopping Rated operating current: 8-15mAh 3V Button stroke: 0.8mm Button strength: 60-7010g Key service life time: 3 million times Package List: 1 * Mouse(No Battery) 1 * Receiver Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.