Lizusidtsy Color: Black Material: plastic Product Dimensions: 63 x 26 x 24 mm / 2.5 x 1 x 0.9 inches Product weight: 32g/0.07lbs Reminder: 1. For those who are accustomed to using ordinary mouse, it only takes a while to operate this new product smoothly. 2. Adjust the elastic ring according to the size of the right index finger, but not too tight, so as not to affect the blood circulation. Package Contents: 1 x 2.4G Wireless Ring Mouse Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.