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. Specification 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: 60-70±10g 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.