The Apex 4 is the latest in Extech's APEX family of lightweight, wearable printers. The APEX branded printers use a 32‐bit Arm 7 micro-controller, a flash based, highly integrated CPU. The processor incorporates FLASH and SRAM memory and provides for improved performance. The internal memory FLASH contains the firmware and resident fonts, rotated fonts, and bar codes while the internal SRAM is used for pre‐initialized variable storage and stack. The print mechanism is a clamshell design from SEIKO with a maximum rated print speed of 3 inches per second.
The APEX printers use a Lithium Ion battery delivering 2.25 amps of power for more receipts per charge; the battery is covered under the UL 2054 standard. The APEX 4 includes additional elastomer over‐molding for robust environments. APEX 4 is IEC 64 certified and has IP54 rating with a specially designed environmental case.
The printer includes additionally 4MB of Flash and 1MB of SRAM of external memory for the user to make use of. Flash memory is used for downloaded logos, additional fonts and other graphic elements. Eight separate logo locations each of 64KB are available to help application developers in improving both look and data communication time for each form or receipt.
SRAM memory, which does not require refreshing, is ideal for mobile computing applications as it helps increase the number of receipts possible on a charge. This memory is used for uninitialized variable storage and print buffering operations which include communication, printing and form rendering. Optional double memory up to 8MB and 4MB will be available. A new high speed communication system allows for USB, Bluetooth and 802.11g communication at 115K. The 4" printers offer USB and BluetoothTM communications as standard in addition to 802.11g as an integrated option.