... accept ainternet order 3. GPRS communication mode Customized Portable Wireless GPRS SMS Printers Hardware Instruction Pull to open the cover ... key:j, k, l, J, K, L, 56 key:m, n, o, M, N, O, 67 key:p, q, r, s, ... necessary. Other settings:Date: the form is MM-DD-YYYY. M is month, D is date, Y is yearTime: the ... form is H-M, H is hour, M is minute. 24 hoursPrint Speed: H is quick ...