1. Symmetrical non-slip side wing design, fits the thumb and ring finger, and feels comfortable. 2. The large gear non-slip roller with scale responds quickly when clicked, can quickly capture the target, and quickly flip through emails/web pages. 3. The unusable DIP keys are only for decoration and cannot be used. 4. The surface of the mouse adopts high-gloss black leather texture, which feels comfortable, stylish and simple. 5. The wire is resistant to pulling and strong. Specifications: 1. Size: 123x63x32mm. 2. Working voltage: 4.75-5.25V. 3. Working current: 3-7mA. 4. Key life: about 5 million switch life.Specification: Package Weight One Package Weight 0.13kgs / 0.29lb One Package Size 18.9cm * 8cm * 3.9cm / 7.44inch * 3.15inch * 1.54inch Qty per Carton 110 Carton Weight 14.19kgs / 31.28lb Carton Size 46cm * 42cm * 40cm / 18.11inch * 16.54inch * 15.75inch Loading Container 20GP: 345 cartons * 110 pcs = 37950 pcs 40HQ: 801 cartons * 110 pcs = 88110 pcs