Features: Purely physical mapping, stable continuous sending without banning. Using capacitance pulse physical mapping technology, 4-level frequency conversion speed regulation. 4-finger linkage, flexible operation. Universal for left or right. Auxiliary ballistic correction. Can be used for phones even with screen protector or with for case. Specifications: Material:Metal+ABS Size:Approx.5.35x3.29x3.03cm/2.1x1.29x1.19inches Color:Black Applicable size: thickness 7.5-11.5mm Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 2x Buttons