You need a pointing device? But you don't have enough room for a separate mouse? In that case the ultraflat compact keyboard with integrated trackball will solve your problem. It's perfect for 19 inch applications. Slimline PCs and notebooks. It also has additional input options for pen-based computers. - Two functions combined in one device.- Integrated. high-quality 16 mm trackball.- Space-efficient lightweight.- Extremely flat design.- Keycaps arranged in 18 mm grid.- LEDs indicate status of operating functions.- Number of keys: 84 (European version). 83 (US version).- Uses mechanical keys from our ML series with high-precision key action.- High reliability thanks to Gold Crosspoint contacts.- Reliability: MTBF: 134.000 hours.- Individual keys have long service life: approx. 20 million key operations.