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 mouseModel: 3500L wireless mouseWeight: 48.6gSize: Approx. 10.2*6*1.5cm/4.02*2.36*0.59inPhotoelectric resolution: 1200 DPIInterface: USBColor: Black Red Blue OptionalNumber of buttons: 4Left and right keysPulley (can be pressed)Key for changing the resolution(below the pulley)Battery: AAA Battery*2 (Not Included)Wireless transmission distance: 10mWireless carrier frequency: 2402MHz-2480MHzWireless working channel: 16 automatic frequency hoppingRated operating current: 8-15mAh 3VButton stroke: 0.8mmButton strength: 60-7010gKey service life time: 3 million timesPackage 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.