... speed ARM series CPU 2,Flash stroage, 2MB, the available data space is 1.8M 3,26keys standard collector keypad Technical ... 128 code, IT25, Codebar, UPCA and UPCE, etc.11) 433M wireless data transmission chipCommuniction frequency: 433M, two-way communication, two-way ... : CRC checkout to ensure the accuracy of the wireless transmission of data12) Wireless base station and handheld terminal use in pair, ...