BeST Trackpad Sensor, 2nd Generation

The circular sensor, developed by Oliver Völckers can be used both as a mouse pointer control and as cursor keys with click. The new circuit is ultra low-power and can operate for over three years with ordinary AA batteries.

The development was made for one of the largest manufacturers of TV remote controls and smart home devices, Universal Electronics Inc. (UEI) from USA https://www.uei.com