... APS's ELM205HS and SAMSUNG's SMP640V printer mechanism , is suitable for mini-thermal receipt printer, thermal cash register, etc.GY-2RB Functions ... ×0.12mmDriverStepping motor(4.2-10VDC pulse voltage)Thermal head average resistance value176Ω±4%Printing speed(Max ... 's ELM205HS and SAMSUNG's SMP640V printer mechanismScopeMini/pocket Cash register, POS printer, etc. Mini dot printer head