INSIZE Wireless Transmitter for Digital Calipers Transmits wireless data from INSIZE Digital Calipers 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 Caliper Series 1108. To transmit Data, press the Data Send Button on the top of the Transmitter. The Data will be transmitted, and the Signal Light on the Transmitter will flash once to confirm the data was transmitted.