The Mahr Federal 1086 Ri 4337124 Wireless Digital Indicator has an 8mm Stem with a measuring range of 0.5" / 12.5mm. This is the most modern technology in the indicator industry with the integrated wireless system i-wi. It gives the user much more freedom of movement. There are no cables to hinder movement when measuring in or on the machine or on large work pieces. The wireless connection simplifies the collection and documentation of measurement data. It is sent by the DTI to an i-Stick, which lies like a little memory stick in the USB port of the computer. Via the radio system data can be integrated directly and automatically into Excel or in any Windows program. With the i-wi-system up to 8 gages per i-stick receiver can be connected. The transmitter is built into the gage, is energy efficient and does not require a separate battery.