Features: 1) Huge cashbox capacity: 2.5L 2) 8 lines dot matrix LCD with background light 3) Coin box: 3mm thick reinforced steel vault door equipped with a special security locking, 2mm thick steel plat in other part 4) Coin dimensions: a) Thickness: 1.2 ~ 3.2mm b) Diameter: 16 ~ 31mm 5) Supporting three charge modes: polar reverse signal, pulses signal and manual 6) Supporting adjusting volume manually during the call 7) Dynamic display the balance and call duration in the call 8) Supporting multi-langrage display 9) Update tariff rate table, parameters and program via Management System 10) Alarm messages, such as handset-lose, door-open, low-battery, could be reported to the Management System