... with the international standard of GSM mobile phone.Built-in microphone, support monitoring functions.Low power consumption, standby time ... OEM customized for the user, but can not support the wireless feature upgrades. Lightweight, compact, dynamic, fashion design.Specification:Mode ... On-off buttons, SOS,hook key, answer keyUSB port: MINI-USB12PIN charge/headphone jack /DATASIM position: built-in SIM ...