INSIZE Wireless Transmitter for Digital Micrometers Transmits wireless data from INSIZE Digital Micrometers to an INSIZE Wireless Receiver (not included). Details are as follows... Conforms to IEEE802 wireless standard 2.4GHz band communication frequency Data Transmission up to 50'. Works with INSIZE Digital Micrometer Series 3101 To transmit Data, you can press the Data Send Button on the Micrometer. The Data will be transmitted, and the Signal Light on the face of the Micrometer Display will flash once to confirm the data was transmitted.