pg-9139 wireless controller for n-switch* applicable device: switch console/tablet/pc(win 7/8/10)/smart phone,to play games after bluetooth connected! * the structure conforms to ergonomics and feels comfortable. * support 3d switch function, switch 3d and function button as per user experience, get better experience. * back key l1,l2,r1,r2 auto-defined programming. * colorful led back light.electrical parameter:* working voltage: dc3.7v;* working current: <35ma;* working time: >15h;* static current: <40ua;* input voltage/current: dc5v/500ma;* bt 3.0, transmission distance: ? 8m;* battery capacity: 650mah;* battery standby time: 30 days once fully charged;