Feature: 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 correction. Can be used for phones even with screen protector or with case. Specification: Model: AK05 Battery capacity: 50mAh Compatible mobile phones: for smartphones with thickness less than 11mm Color: Black Material: ABS Package Contents: 1pair x Game Controller 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.