Epson TM-T20II OT-WL05 Technical Reference Guide - Page 13

Chapter 1 Product Overview Environmental Specifications Item Specifications Temperature Operating Conditions 0 to 45°C {41 to 113°F} * Storage Conditions -5 to 50°C {23 to 122°F} Humidity Operating Conditions 10 to 90% RH Storage Conditions 10 to 90% RH However, the surface temperature for the wireless LAN unit is less than 70°C {158°F}. 1 Limitations for wireless communication  The transmission of the radio waves cannot be stopped. The only way to stop the transmission of radio waves is to turn the TM printer off.  Countries where this product can be used are limited. Since notes are provided for each country, check the manual supplied with the product.  When setting the encryption type, there are the following restrictions:  WPA-PSK/WPA2-PSK/WPA2-Enterprise are not available in the ad hoc mode.  When using the OT-WL05 in the ad hoc mode, printing a status sheet is subject to the following restrictions  Even if there is no host computer to connect to, "Connect" appears as the Link Status.  Between power-on and the time when the printer to connect is found, "0dBm" appears as the Signal Level. If the host computer connected to the TM printer discontinues communication, the value that had been obtained immediately before discontinuation of communication is held appears. 13