... . other industry which accept ainternet order 3. GPRS communication mode Customized Portable Wireless GPRS SMS Printers Hardware Instruction Pull to open ... :d, e, f, D, E, F, 34 key:g, h, i, G, H, I, 45 key:j, k, l, J, K, L ... month, D is date, Y is yearTime: the form is H-M, H is hour, M is minute. 24 hoursPrint Speed ... : H is quick, M is normal, L is slow. M is ...