OSDP COMSET configuration tool for OSDP Readers & peripheral devices (PDs). The OTT-2100 is a pocket-sized tool for quickly and easily configuring the address and baud rate parameters of OSDP readers and other PDs. DIP Switches are used to set the address and baud rate to the desired values. Three LEDs display the status of the device. Plastic Enclosure: no dust or water intrusion rating. Battery powered: 3V coin cell (CR2032) battery included. Weight: 1 oz. (approx). Overall dimensions of unit: 3.00" x 1.375" x 0.975" (approx).